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ss September 19th 20 09:03 PM

Help with electrics for mini lathe.
 
Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

[email protected] September 19th 20 10:34 PM

Help with electrics for mini lathe.
 
On Saturday, 19 September 2020 21:03:41 UTC+1, ss wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


image not visible.
It'll be a motor start or run cap, look those up of the capacity yours is (in uF). Pick the same uFs & voltage rating.


NT

ss September 19th 20 11:18 PM

Help with electrics for mini lathe.
 
On 19/09/2020 22:34, wrote:
On Saturday, 19 September 2020 21:03:41 UTC+1, ss wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

image not visible.
It'll be a motor start or run cap, look those up of the capacity yours is (in uF). Pick the same uFs & voltage rating.


NT

Try this link.
https://photos.google.com/album/AF1Q...Hg8rkea3H47NcO

alan_m September 19th 20 11:50 PM

Help with electrics for mini lathe.
 
On 19/09/2020 21:03, ss wrote:
Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


4uF 440V AC
https://www.rapidonline.com/ducati-4...acitor-10-2966

Search ebay for
Ducati 4.16.10.06.14 4UF

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

ss September 20th 20 12:20 AM

Help with electrics for mini lathe.
 
On 19/09/2020 23:50, alan_m wrote:
4uF 440V AC
https://www.rapidonline.com/ducati-4...acitor-10-2966


Search ebay for
Ducati 4.16.10.06.14 4UF


Thanks Alan that would be ideal thats about quarter the size of the one
thats currently installed.

John Rumm September 20th 20 01:57 AM

Help with electrics for mini lathe.
 
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor

claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

jeff Layman September 20th 20 09:20 AM

Help with electrics for mini lathe.
 
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor

claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.


Why is a 440v AC capacitor being used with a 230/250V motor?The OP did
say the motor had been replaced, so maybe it was a 440V (3 phase?) motor
previously, although that seems a bit strange for a mini-lathe. Anyway,
that capacitor is well past its sell-by date if the "1966" on it is
accurate. I haven't checked, but a 240V capacitor should be even smaller.

--

Jeff

jeff Layman September 20th 20 09:24 AM

Help with electrics for mini lathe.
 
On 19/09/2020 22:34, wrote:
On Saturday, 19 September 2020 21:03:41 UTC+1, ss wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

image not visible.


It wasn't visible with Pale Moon, but was with FF 80.0. I'd seen this
before with Imgur and PM a week or so ago, so something on Imgur doesn't
like Pale Moon, or vice-versa. Unfortunately the PM forum server seems
down at the moment, so I can't check if it's been reported previously.

--

Jeff

Harry Bloomfield, Esq.[_2_] September 20th 20 09:44 AM

Help with electrics for mini lathe.
 
jeff Layman has brought this to us :
I haven't checked, but a 240V capacitor should be even smaller.


240v RMS, the voltage peaks are much higher and the cap needs to be ac
rated.

A three phase motor would not have needed a start/run capacitor.
Likely, one single phase motor has been replaced by another. Perhaps
the original was an ac/dc type motor.

Tim Lamb[_2_] September 20th 20 10:20 AM

Help with electrics for mini lathe.
 
In message , jeff Layman
writes
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

It looks like a 4 uF motor run cap.
Something like:

https://cpc.farnell.com/ducati/4-16-...f-450vac-lead/
dp/CA05802?st=4uf%20motor%20run%20capacitor
claims to be 55mm tall, and 28mm diameter - so probably a bit
smaller
than the one you have.


Why is a 440v AC capacitor being used with a 230/250V motor?The OP did
say the motor had been replaced, so maybe it was a 440V (3 phase?)
motor previously, although that seems a bit strange for a mini-lathe.
Anyway, that capacitor is well past its sell-by date if the "1966" on
it is accurate. I haven't checked, but a 240V capacitor should be even
smaller.


er. Does the 440V represent the peak voltage encountered? 3 phase would
not require a capacitor.


--
Tim Lamb

Martin Brown[_3_] September 20th 20 10:40 AM

Help with electrics for mini lathe.
 
On 19/09/2020 23:18, ss wrote:
On 19/09/2020 22:34, wrote:
On Saturday, 19 September 2020 21:03:41 UTC+1, ssÂ* wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box
size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

image not visible.
It'll be a motor start or run cap, look those up of the capacity yours
is (in uF). Pick the same uFs & voltage rating.


NT

Try this link.
https://photos.google.com/album/AF1Q...Hg8rkea3H47NcO

Fails 404. He is right though it is a run capacitor and you will need
one that is about the same value and voltage rating. It may not be all
that much smaller unless your lathe is truly very ancient.

Rapidonline will give you some idea of typical dimensions for mains:

https://www.rapidonline.com/Catalogu...un%20capacitor

--
Regards,
Martin Brown

Martin Brown[_3_] September 20th 20 11:13 AM

Help with electrics for mini lathe.
 
On 20/09/2020 09:20, jeff Layman wrote:
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box
size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor


claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.


Why is a 440v AC capacitor being used with a 230/250V motor?The OP did
say the motor had been replaced, so maybe it was a 440V (3 phase?) motor
previously, although that seems a bit strange for a mini-lathe. Anyway,
that capacitor is well past its sell-by date if the "1966" on it is
accurate. I haven't checked, but a 240V capacitor should be even smaller.


The capacitor has to survive being attached to 240 rms ac mains voltage
which has peaks 1.4x higher and with a margin for the odd glitch.

This site labours the point a bit but shows the difference.

https://www.electronics-tutorials.ws...s-voltage.html

--
Regards,
Martin Brown

ARW September 20th 20 11:46 AM

Help with electrics for mini lathe.
 
On 20/09/2020 11:13, Martin Brown wrote:
On 20/09/2020 09:20, jeff Layman wrote:
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec
box size.
Is a more modern one smaller and if so what sort of ratings am I
looking
for on eBay?

Image:
https://imgur.com/igFcKqj

It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor


claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.


Why is a 440v AC capacitor being used with a 230/250V motor?The OP did
say the motor had been replaced, so maybe it was a 440V (3 phase?)
motor previously, although that seems a bit strange for a mini-lathe.
Anyway, that capacitor is well past its sell-by date if the "1966" on
it is accurate. I haven't checked, but a 240V capacitor should be even
smaller.


The capacitor has to survive being attached to 240 rms ac mains voltage
which has peaks 1.4x higher and with a margin for the odd glitch.

This site labours the point a bit but shows the difference.

https://www.electronics-tutorials.ws...s-voltage.html


What if the cap is charged up one cycle and power is applied with the
other cycle. That wound mean you need a 750V cap

--
Adam

Peter Parry September 20th 20 11:47 AM

Help with electrics for mini lathe.
 
On Sat, 19 Sep 2020 21:03:25 +0100, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?



It is an Emco Unimat SL1 . Originally it would have been fitted with a
universal (AC/DC) motor identical to the ones fitted to Singer sewing
machines so no capacitors needed and easy reversing.

There are quite a few videos and other posts around on fitting
assorted motors to these lathes. The original universal motors were
somewhat underpowered and ran hot so failure was common and all sorts
of replacements were used. The induction motor fitted to yours would
have required modification to the original very simple wiring to
allow it to reverse.


The Natural Philosopher[_2_] September 20th 20 12:18 PM

Help with electrics for mini lathe.
 
On 19/09/2020 21:03, ss wrote:
Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj



Completely blank for me I am afraid. On desktop firefox

Mobile sees it by as I tried to zoom in it vanished to be replaced by
pictures of dogs and cats.

The brief glance I got suggests it is a typical 'phase lead' starter cap
of the oil and paper variety that could easily be substituted by
something one tenth the size if you had actually said what value it was...

--
€śThose who can make you believe absurdities, can make you commit
atrocities.€ť

€• Voltaire, Questions sur les Miracles Ă* M. Claparede, Professeur de
ThĂ©ologie Ă* Genève, par un Proposant: Ou Extrait de Diverses Lettres de
M. de Voltaire

The Natural Philosopher[_2_] September 20th 20 12:19 PM

Help with electrics for mini lathe.
 
On 19/09/2020 23:18, ss wrote:
On 19/09/2020 22:34, wrote:
On Saturday, 19 September 2020 21:03:41 UTC+1, ssÂ* wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box
size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj

image not visible.
It'll be a motor start or run cap, look those up of the capacity yours
is (in uF). Pick the same uFs & voltage rating.


NT

Try this link.
https://photos.google.com/album/AF1Q...Hg8rkea3H47NcO

Error 404

--
The biggest threat to humanity comes from socialism, which has utterly
diverted our attention away from what really matters to our existential
survival, to indulging in navel gazing and faux moral investigations
into what the world ought to be, whilst we fail utterly to deal with
what it actually is.


The Natural Philosopher[_2_] September 20th 20 12:21 PM

Help with electrics for mini lathe.
 
On 20/09/2020 09:44, Harry Bloomfield wrote:
jeff Layman has brought this to us :
I haven't checked, but a 240V capacitor should be even smaller.


240v RMS, the voltage peaks are much higher and the cap needs to be ac
rated.

A three phase motor would not have needed a start/run capacitor. Likely,
one single phase motor has been replaced by another. Perhaps the
original was an ac/dc type motor.

A 400VDC cap is what is needed on 230V AC, but not '440VAC' which is
more like 630vDC from memory


--
The biggest threat to humanity comes from socialism, which has utterly
diverted our attention away from what really matters to our existential
survival, to indulging in navel gazing and faux moral investigations
into what the world ought to be, whilst we fail utterly to deal with
what it actually is.


The Natural Philosopher[_2_] September 20th 20 12:21 PM

Help with electrics for mini lathe.
 
On 20/09/2020 11:46, ARW wrote:
On 20/09/2020 11:13, Martin Brown wrote:
On 20/09/2020 09:20, jeff Layman wrote:
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec
box size.
Is a more modern one smaller and if so what sort of ratings am I
looking
for on eBay?

Image:
https://imgur.com/igFcKqj

It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor


claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.

Why is a 440v AC capacitor being used with a 230/250V motor?The OP
did say the motor had been replaced, so maybe it was a 440V (3
phase?) motor previously, although that seems a bit strange for a
mini-lathe. Anyway, that capacitor is well past its sell-by date if
the "1966" on it is accurate. I haven't checked, but a 240V capacitor
should be even smaller.


The capacitor has to survive being attached to 240 rms ac mains
voltage which has peaks 1.4x higher and with a margin for the odd glitch.

This site labours the point a bit but shows the difference.

https://www.electronics-tutorials.ws...s-voltage.html


What if the cap is charged up one cycle and power is applied with the
other cycle. That wound mean you need a 750V cap

not really,no. Its not in a voltage doubler.


--
"A point of view can be a dangerous luxury when substituted for insight
and understanding".

Marshall McLuhan


Jeff Layman[_2_] September 20th 20 01:07 PM

Help with electrics for mini lathe.
 
On 20/09/2020 09:44, Harry Bloomfield wrote:
jeff Layman has brought this to us :
I haven't checked, but a 240V capacitor should be even smaller.


240v RMS, the voltage peaks are much higher and the cap needs to be ac
rated.


It would be. I didn't bother stating "AC" again for the 240V capacitor
as I had made clear the original was 440V AC.

A three phase motor would not have needed a start/run capacitor.
Likely, one single phase motor has been replaced by another. Perhaps
the original was an ac/dc type motor.


Were there many 440V single-phase motors around in 1966? It just seemed
an unusual combination for a fairly low-power device.

--

Jeff

Martin Brown[_3_] September 20th 20 01:08 PM

Help with electrics for mini lathe.
 
On 20/09/2020 11:46, ARW wrote:
On 20/09/2020 11:13, Martin Brown wrote:
On 20/09/2020 09:20, jeff Layman wrote:


Why is a 440v AC capacitor being used with a 230/250V motor?The OP
did say the motor had been replaced, so maybe it was a 440V (3
phase?) motor previously, although that seems a bit strange for a
mini-lathe. Anyway, that capacitor is well past its sell-by date if
the "1966" on it is accurate. I haven't checked, but a 240V capacitor
should be even smaller.


The capacitor has to survive being attached to 240 rms ac mains
voltage which has peaks 1.4x higher and with a margin for the odd glitch.

This site labours the point a bit but shows the difference.

https://www.electronics-tutorials.ws...s-voltage.html


What if the cap is charged up one cycle and power is applied with the
other cycle. That wound mean you need a 750V cap


It doesn't quite work that way. A capacitor put across a voltage
instantaneously looks like a dead short until it starts to charge.

A charged capacitor the wrong way around could double the inrush
*current* but it wouldn't take it out of operating voltage range.

--
Regards,
Martin Brown

Jeff Layman[_2_] September 20th 20 01:12 PM

Help with electrics for mini lathe.
 
On 20/09/2020 10:20, Tim Lamb wrote:
In message , jeff Layman
writes
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj
It looks like a 4 uF motor run cap.
Something like:

https://cpc.farnell.com/ducati/4-16-...f-450vac-lead/
dp/CA05802?st=4uf%20motor%20run%20capacitor
claims to be 55mm tall, and 28mm diameter - so probably a bit
smaller
than the one you have.


Why is a 440v AC capacitor being used with a 230/250V motor?The OP did
say the motor had been replaced, so maybe it was a 440V (3 phase?)
motor previously, although that seems a bit strange for a mini-lathe.
Anyway, that capacitor is well past its sell-by date if the "1966" on
it is accurate. I haven't checked, but a 240V capacitor should be even
smaller.


er. Does the 440V represent the peak voltage encountered? 3 phase would
not require a capacitor.


Agreed 3-phase would not require a starter capacitor, but a 440V
single-phase motor would. As I just replied to Harry, it seems odd that
a low-power lathe would use a 440V motor. A 240V AC capacitor is rated
to handle the peaks associated with that voltage.

--

Jeff

Peter Parry September 20th 20 01:15 PM

Help with electrics for mini lathe.
 
On Sun, 20 Sep 2020 13:12:02 +0100, Jeff Layman
wrote:

Agreed 3-phase would not require a starter capacitor, but a 440V
single-phase motor would. As I just replied to Harry, it seems odd that
a low-power lathe would use a 440V motor. A 240V AC capacitor is rated
to handle the peaks associated with that voltage.


By the look of the wiring it was made of bits which happened to be
around. It's an Emco Unimat lathe and would originally have used a
sewing machine motor.


John Rumm September 20th 20 01:15 PM

Help with electrics for mini lathe.
 
On 20/09/2020 11:46, ARW wrote:
On 20/09/2020 11:13, Martin Brown wrote:
On 20/09/2020 09:20, jeff Layman wrote:
On 20/09/2020 01:57, John Rumm wrote:
On 19/09/2020 21:03, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec
box size.
Is a more modern one smaller and if so what sort of ratings am I
looking
for on eBay?

Image:
https://imgur.com/igFcKqj

It looks like a 4 uF motor run cap.

Something like:

https://cpc.farnell.com/ducati/4-16-...un%20capacitor


claims to be 55mm tall, and 28mm diameter - so probably a bit smaller
than the one you have.

Why is a 440v AC capacitor being used with a 230/250V motor?The OP
did say the motor had been replaced, so maybe it was a 440V (3
phase?) motor previously, although that seems a bit strange for a
mini-lathe. Anyway, that capacitor is well past its sell-by date if
the "1966" on it is accurate. I haven't checked, but a 240V capacitor
should be even smaller.


The capacitor has to survive being attached to 240 rms ac mains
voltage which has peaks 1.4x higher and with a margin for the odd glitch.

This site labours the point a bit but shows the difference.

https://www.electronics-tutorials.ws...s-voltage.html


What if the cap is charged up one cycle and power is applied with the
other cycle. That wound mean you need a 750V cap


Its not much different from normal operation - just the alternate
polarity cycle will come a bit quicker.

(note many are setup with a bleed resistor to drain off any charge after
power down anyway)


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Peter Parry September 20th 20 01:24 PM

Help with electrics for mini lathe.
 
On Sat, 19 Sep 2020 21:03:25 +0100, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.


https://unimat.homestead.com/motortips.html has lots on Unimat motor
options. Do remember it is an American site so nearly all 110VAC.


Roger Mills[_2_] September 20th 20 02:09 PM

Help with electrics for mini lathe.
 
On 20/09/2020 12:18, The Natural Philosopher wrote:
On 19/09/2020 21:03, ss wrote:
Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box
size.
Is a more modern one smaller and if so what sort of ratings am I
looking for on eBay?

Image:
https://imgur.com/igFcKqj



Completely blank for me I am afraid. On desktop firefox

Mobile sees it by as I tried to zoom in it vanished to be replaced by
pictures of dogs and cats.

The brief glance I got suggests it is a typical 'phase lead' starter cap
of the oil and paper variety that could easily be substituted by
something one tenth the size if you had actually said what value it was...


He did, in effect. The photo in the original post included a view of the
cap label.
--
Cheers,
Roger

The Natural Philosopher[_2_] September 20th 20 03:13 PM

Help with electrics for mini lathe.
 
On 20/09/2020 13:07, Jeff Layman wrote:
On 20/09/2020 09:44, Harry Bloomfield wrote:
jeff Layman has brought this to us :
I haven't checked, but a 240V capacitor should be even smaller.


240v RMS, the voltage peaks are much higher and the cap needs to be ac
rated.


It would be. I didn't bother stating "AC" again for the 240V capacitor
as I had made clear the original was 440V AC.

A three phase motor would not have needed a start/run capacitor.
Likely, one single phase motor has been replaced by another. Perhaps
the original was an ac/dc type motor.


Were there many 440V single-phase motors around in 1966? It just seemed
an unusual combination for a fairly low-power device.

I cant see the point in unbalancing a three phase network with a single
motor across two phases. I doubt there were any ever.


--
"I guess a rattlesnake ain't risponsible fer bein' a rattlesnake, but ah
puts mah heel on um jess the same if'n I catches him around mah chillun".


The Natural Philosopher[_2_] September 20th 20 03:15 PM

Help with electrics for mini lathe.
 
On 20/09/2020 14:09, Roger Mills wrote:
On 20/09/2020 12:18, The Natural Philosopher wrote:
On 19/09/2020 21:03, ss wrote:
Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box
size.
Is a more modern one smaller and if so what sort of ratings am I
looking for on eBay?

Image:
https://imgur.com/igFcKqj



Completely blank for me I am afraid. On desktop firefox

Mobile sees it by as I tried to zoom in it vanished to be replaced by
pictures of dogs and cats.

The brief glance I got suggests it is a typical 'phase lead' starter
cap of the oil and paper variety that could easily be substituted by
something one tenth the size if you had actually said what value it
was...


He did, in effect. The photo in the original post included a view of the
cap label.

It might have dome, but it was gone before I could read it.

Imgur is now effecteiively ususable

--
"I guess a rattlesnake ain't risponsible fer bein' a rattlesnake, but ah
puts mah heel on um jess the same if'n I catches him around mah chillun".


ss September 20th 20 07:46 PM

Help with electrics for mini lathe.
 
On 20/09/2020 13:24, Peter Parry wrote:
On Sat, 19 Sep 2020 21:03:25 +0100, ss wrote:

Mini lathe 50 odd years old, the motor not original.
I would like to reduce the size of the electric box.


https://unimat.homestead.com/motortips.html has lots on Unimat motor
options. Do remember it is an American site so nearly all 110VAC.


Thanks to all for the replies it has been very useful.

[email protected] September 23rd 20 11:36 PM

Help with electrics for mini lathe.
 
On Sunday, 20 September 2020 09:24:39 UTC+1, jeff Layman wrote:
On 19/09/2020 22:34, tabbypurr wrote:
On Saturday, 19 September 2020 21:03:41 UTC+1, ss wrote:
Mini lathe 50 odd years old, the motor not original.


I would like to reduce the size of the electric box.
It contains an on off switch, an indicator lamp, and a reverse switch.
Inside is a large capacitor which takes up the space if I can replace
the capacitor with a smaller dimension then I can reduce the elec box size.
Is a more modern one smaller and if so what sort of ratings am I looking
for on eBay?

Image:
https://imgur.com/igFcKqj


image not visible.


It wasn't visible with Pale Moon, but was with FF 80.0. I'd seen this
before with Imgur and PM a week or so ago, so something on Imgur doesn't
like Pale Moon, or vice-versa. Unfortunately the PM forum server seems
down at the moment, so I can't check if it's been reported previously.


fwliw I'm using ff, it reports itself as 1.0 but obviously isn't, so dunno what version.

Ss's google link didn't work either, 404.


NT

Jeff Layman[_2_] September 24th 20 01:08 PM

Help with electrics for mini lathe.
 
On 23/09/2020 23:36, wrote:
On Sunday, 20 September 2020 09:24:39 UTC+1, jeff Layman wrote:



Image:
https://imgur.com/igFcKqj

image not visible.


It wasn't visible with Pale Moon, but was with FF 80.0. I'd seen this
before with Imgur and PM a week or so ago, so something on Imgur doesn't
like Pale Moon, or vice-versa. Unfortunately the PM forum server seems
down at the moment, so I can't check if it's been reported previously.


fwliw I'm using ff, it reports itself as 1.0 but obviously isn't, so dunno what version.

Ss's google link didn't work either, 404.


The Pale Moon forum is working again. FYI:
https://forum.palemoon.org/viewtopic.php?f=70&t=25025&hilit=imgur

--

Jeff


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