Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf
I'll look into the encoders later this week.
Many thanks.
JB

On 2011-03-14, JB wrote:
Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf
I'll look into the encoders later this week.
Many thanks.
JB

PMD60 or DCD60 10/20 or 14/28 should work pretty well.

I have AMC 30A8 on all my five axes. They are similar to those
14/28. And they work great. Just a data point.

i

"Ignoramus1540" wrote in message
...
On 2011-03-14, JB wrote:
Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my
motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf
I'll look into the encoders later this week.
Many thanks.
JB

PMD60 or DCD60 10/20 or 14/28 should work pretty well.

I have AMC 30A8 on all my five axes. They are similar to those
14/28. And they work great. Just a data point.

As it's the frim which will be buying these servo drives, I have to go to
VAT registered firm who can provide invoices, warranty etc. On the control
side, I may have to purchase directly from Pico in the US as I don't see any
European distributors for this kit.
What I'm trying to do is spec a system which others have already got working
ok with Linux/EMC2. I don't know Linux, so I really don't want hassle with
device drivers.
Nice to see the 3 main axes move under their own though :)
Cheers,
JB

On 2011-03-14, JB wrote:

"Ignoramus1540" wrote in message
...
On 2011-03-14, JB wrote:
Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my
motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf
I'll look into the encoders later this week.
Many thanks.
JB

PMD60 or DCD60 10/20 or 14/28 should work pretty well.

I have AMC 30A8 on all my five axes. They are similar to those
14/28. And they work great. Just a data point.

As it's the frim which will be buying these servo drives, I have to go to
VAT registered firm who can provide invoices, warranty etc. On the control
side, I may have to purchase directly from Pico in the US as I don't see any
European distributors for this kit.
What I'm trying to do is spec a system which others have already got working
ok with Linux/EMC2. I don't know Linux, so I really don't want hassle with
device drivers.
Nice to see the 3 main axes move under their own though :)

Congrats on getting the axes to move!

I have been very satisfied with this pico system, it does everything
that I want and I can concentrate on what I can do best -- which is
wiring and troubleshooting -- as opposed to screwing around with a
soldering iron. Jon's support has been good to date. It is also
extensible, as you can add more encoders, more D/A converters, etc. I
am already using input from six encoders, for example, and may add one
more.

i

On Mon, 14 Mar 2011 19:33:16 -0000, "JB" wrote:

Nice to see the 3 main axes move under their own though :)
Cheers,
JB

One small reminder of a fact of which I am sure you are awa Be sure
to clean the ways up with some 3M scratch pads or something suitable
before you traverse the table too far or too many times. You don't
want to scar the ways up on your beautiful machine.
Dave

On 2011-03-14, JB wrote:
Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf

Looks pretty good -- as long as 60 VDC is sufficient to get the
full motor RPM. (Or as long as you can live with the lower RPM for the
lower voltage.) Mine want 100 V maximum FWIW -- and current available
will determine acceleration.

Good Luck,
DoN.

--
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On 2011-03-15, DoN. Nichols wrote:
On 2011-03-14, JB wrote:
Having now tested my servos on the Shizuoka and found all working, I now
need to spec some servo drives. If I understand correctly, EMC can output
from the PC, (via a D/A card?), the necessary +/_10V analogue control
signals for the servo drive.
Would then these be suitable assuming that the rating is suited for my motor
volts/current?
http://www.mclennan.co.uk/datasheets...wamplifier.pdf

Looks pretty good -- as long as 60 VDC is sufficient to get the
full motor RPM. (Or as long as you can live with the lower RPM for the
lower voltage.) Mine want 100 V maximum FWIW -- and current available
will determine acceleration.

I do not personally need a very high speed for rapid movements. 60 IPM
is plenty perfect for me. My mill (140v servos) was originally capable
of 200 IPM rapids, but I keep it at 60 IPM. I feel safer and more in
control. 200 IPM rapids would probably save me an hour of machining
time over my lifetime, and would surely cost me some ruined tools,
vises, and possibly worse.

i