I am finally getting around to making a bandsaw, floor model vertical
type mainly for cutting metals, and occasional light woodworking when
I need to cut out patterns or plastics.

Frame is going to be made of 4" x 4" x 3/8" thick walled square tube,
since that is what I already have on hand in sufficient quanity. I
have two (possibly 3) but I intend to make it a 2 wheel type, wheels
made from steel and also cast iron, really heavy duty approximately
16" in diameter and 1" wide. Hopefully it will have a throat of at
least 15" and a cutting height of 8 to 10 inches and a tilting table.
I plan on using a piece of 1/2" plate for the table.

What is the thought of driving this bandsaw with a DC motor of 2hp and
using a DART regulated totally variable speed control on it to adjust
the speeds. I plan on adding a jackshaft or pulley off the bottom
drive wheels shaft to the motor and use a timing type or serpentine
type belt to connect it

Should it have enough butt to work with this 2 hp DC motor and a good
controller or should I opt for AC motor and gear reduction by way of
pulleys and jackshaft or gearbox. I really prefert o use up some of
these DC motors I have.

Open for any and all suggestions

Regards
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I had no input whatsoever.
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Should it have enough butt to work with this 2 hp DC motor and a good
controller or should I opt for AC motor and gear reduction by way of
pulleys and jackshaft or gearbox. I really prefert o use up some of
these DC motors I have.

I think the DC motor would be good, but I would still put a gear or belt
reduction on it to keep the motor speed up. Take a look at similar equipment
for the equivalent ratios. I've installed DC motors on a lot of equipment and
have always had good luck with them.

Earle Rich
Mont Vernon, NH

(Roy) wrote in message
What is the thought of driving this bandsaw with a DC motor of 2hp ... I really prefert o use up some of
these DC motors I have.

Hey Roy

You make it sound like you have a few of these 2HP motors... What
Voltage do they run at, or how much Current do they draw?

2 HP would be close to 2KWatts (746W/HP plus ineffeciencies) so the
controller would need to be able to handle that at minimum... Just a
guess...

P=V X I so if thier 90VDC motors outputting 2000W of power (I=2000/90)
the current draw would be approx 22Amps.

Milage may vary ie; startup, load on blade etc...

Frank
http://www.theworkshop.ca

I have some that ar 90 and others 130VDC. I have a super controller
capable of running them without a problem, and it will handle up to a
20 amp draw. Been fooling around with one of themn for awhile now, and
it runs like a champ. Even if slowed way down to barely a crawl its
next to impossible to stall out.

Yep, I have a heap of them, and someday I hoppe to have em on
everything possible that I have as I like the variable speed option.
Its amazing what exercise equipment has in them. I must have taken 20
or more treadmills apart and have yet to get a bad motor, as its
always a controller or some other part or in a few cases nothing at
all. I have a deal with a local exercise equipment dealer that Iwill
come within 48 hours of his call to remove at least a pickup full of
accumulated equippment from behind his store, and I can get 3 or 4
treadmills in my truck.

He also deals in spas, and hot tubs, so I have accumulated a few nice
pumps and AC 115 /220 volt motors as well.

I must have 5000# of assorted barbell and exercise equipment weights,
both the cast iron and plastic cemennt filled types, and lots of other
neat stuff like pulleys and belts, shafting and good quality bearings,
and screw actuators, electromagnets etc.

I made a ferrous material picker-upper powered by a 115VAC
electromagnet that was used to put a resistaant force on a flywheel in
an electric exercycle. Its variable strenth with a potentiometer. I
mounted it in a stainless steel box, and added a pair od wheels and a
push handle,. Plug it in, turn it on and roll it around, and it sucks
up nuts bolts, stubs of welding rods anbd chips etc, pick it up and
put i over the trash can and turn it off and it dumps its collection.
Good for around the house when I reroof a outbuilding etc for those
stray tar paper nails.

On 24 Nov 2003 13:36:23 -0800, (Frank) wrote:

(Roy) wrote in message
=== What is the thought of driving this bandsaw with a DC motor of 2hp ... I really prefert o use up some of
=== these DC motors I have.
===
===Hey Roy
===
===You make it sound like you have a few of these 2HP motors... What
===Voltage do they run at, or how much Current do they draw?
===
===2 HP would be close to 2KWatts (746W/HP plus ineffeciencies) so the
===controller would need to be able to handle that at minimum... Just a
===guess...
===
===P=V X I so if thier 90VDC motors outputting 2000W of power (I=2000/90)
===the current draw would be approx 22Amps.
===
===Milage may vary ie; startup, load on blade etc...
===
===Frank
===http://www.theworkshop.ca

Visit my website: http://www.frugalmachinist.com
Opinions expressed are those of my wifes,
I had no input whatsoever.
Remove "nospam" from email addy.

After all these years watching your ambitious projects and the skill and
speed that you accomplish them, well....I want a transfusion of you blood.


"Roy" wrote in message
...
I am finally getting around to making a bandsaw, floor model vertical
type mainly for cutting metals, and occasional light woodworking when
I need to cut out patterns or plastics.

Frame is going to be made of 4" x 4" x 3/8" thick walled square tube,
since that is what I already have on hand in sufficient quanity. I
have two (possibly 3) but I intend to make it a 2 wheel type, wheels
made from steel and also cast iron, really heavy duty approximately
16" in diameter and 1" wide. Hopefully it will have a throat of at
least 15" and a cutting height of 8 to 10 inches and a tilting table.
I plan on using a piece of 1/2" plate for the table.

What is the thought of driving this bandsaw with a DC motor of 2hp and
using a DART regulated totally variable speed control on it to adjust
the speeds. I plan on adding a jackshaft or pulley off the bottom
drive wheels shaft to the motor and use a timing type or serpentine
type belt to connect it

Should it have enough butt to work with this 2 hp DC motor and a good
controller or should I opt for AC motor and gear reduction by way of
pulleys and jackshaft or gearbox. I really prefert o use up some of
these DC motors I have.

Open for any and all suggestions

Regards
Visit my website: http://www.frugalmachinist.com
Opinions expressed are those of my wifes,
I had no input whatsoever.
Remove "nospam" from email addy.

Roy wrote:

pulleys and jackshaft or gearbox. I really prefert o use up some of
these DC motors I have.

Are these "2hp" DC motors surplus treadmill motors? If so, count on 3/4
hp. I have a couple that I plan to build controllers for or just run of
variacs (we'll see). Some tests I ran suggest that trying to get much
more than 3/4 hp out of them on a semi-continuous basis is likely to let
the smoke out.

Ted