View Full Version : 200 Oz-In 6.5 Amp Bipolar Parallel

04-29-2003, 03:41 PM
what would be a good driver for Model P22NRXA-LDS-NS-02NEMA 23
200 Oz-In
8 Wire
May be Wired Bipolar, Unipolar, Series, or Parallel
3.3 Amp Bipolar Series ~ 6.5 Amp Bipolar Parallel
2.71 Amp Unipolar Series ~ 4.6 Amp Unipolar Parallel
1.8 Degree / 200 Steps Per Revolution
and i have a 24 v 6.5 amp power supply
would the G201 work for this motor ?
for xyz Central Machinery

This mini mill/drill machine has two speed ranges—0 to 1100 RPM and 0 to 2500 RPM—great for different thicknesses and types of material. Features a micro feed that allows the operator to feed at .002'' per line.

Heavy duty cast iron body and base for better stability. Precision machined table. Includes drill chuck & key, shaft and chuck key assembly and wrenches.
Motor: 4/5 HP, 120V, single phase
Speed ranges: 0-1100 RPM low, 0-2500 RPM high
Spindle taper: R8 with JT33 chuck taper
Spindle stroke: 8-1/2''
JT33 chuck capacity: 7/64'' to 1/2''
End mill capacity: 1/2''
Face mill capacity: 1''
Swing: 12''
Depth scale: 0 to 12'' in 1/16'' increments
Table slot width: 1/2''
Table dimensions: 15-7/8'' x 3-11/16''
Height: 33-3/4''

04-29-2003, 06:47 PM

The g201 sholud work. They are rated at 7 amps. You could email them to see what they recommend.

You need a bigger powersupply if those motors really are 35 volts. You should be running the powersupply at some positive multiple of the motor voltage. For example 35 volt powersupply for a 5 volt motor. Also you need more current. You won't run 3 6.5 amp motors on a 6 amp powersupply.


04-30-2003, 01:13 PM
Dose the G201 do Full and Half-step?
whats the diffrents g201 or the g210?

thanks mitch

04-30-2003, 05:52 PM
All the info is on the gecko website. http://www.geckodrive.com/

I am moving this to the gecko forum so hopefully we get more/better replies.

04-30-2003, 05:55 PM
G201 specs-
7A, 80V 10 microstep drive


0.3A to 7A phase current
24V to 80V power supply
10 microsteps per step
Size 17 to 42 motors
Mid-band resonance compensation
Low-speed resonance nulling trimpot
Auto current reduction
200kHz max step rate
Opto-isolated Step and Direction
20W dissipation at 7A per phase
Silent: 20kHz master oscillator PWM
0C to 70C operating temperature
Rugged: All n-channel TO-220 MOSFETs
LED power indicator
Small size: 2.5" by 2.5" by 0.82" (63mm by 63mm by 21mm)
Light: 3.6 oz (100gm)
Anodized aluminum package
Modular 2-piece main connector

05-01-2003, 12:30 PM
I ordered one G201 7A, 80V 10 microstep drive to test yesterday
one thing i dont understand is why the voltage rating is so high on all these Pacific Scientific Powermax II Stepper Motors I got off E-BAY.
I have six Power max II P21nsxc-LSS-NS-03 65 volt max 1.75amp Nema 23 1.8degree 200steps per revolution 116oz of holding torque.
I have 2 need to get 1 more Pacific Scientific Powermax II Stepper Motor Model P22NRXA-LDS-NS-02 NEMA 23 200 Oz-In 8 Wire
May be Wired Bipolar, Unipolar, Series, or Parallel
3.3 Amp Bipolar Series ~ 6.5 Amp Bipolar Parallel
2.71 Amp Unipolar Series 35VDC
1.8 Degree / 200 Steps Per Revolution
Dual Shaft with Flats
I wonder what the power suppy voltage needs to be.

05-01-2003, 03:02 PM
I thank I found the volts per/phase it is multiply rated current by the rated resistance to arrive at the motors voltage. so for my 200 oz-in would be 6.5 amp * res .21= 1.363 volts so a 24v power supply should work good and i have one 6.5 amp 24vpower supply and i will get 2 more so i will have some over kill

05-05-2003, 03:08 PM
hi my power supply only puts out 23.8 volts I know the g201 needs 24 to 80 would this work or do i need 24 + volts my transformer is 17vac *1.4=23.8 win rounded off would it be 24v?

thanks mitch

05-05-2003, 09:47 PM
I can't see the .2 volts making a difference. Really tho, to fully take advantage of the gecko drive, you should be running a high a voltage as you can. 24 volts will be good for learning, but if it were me, I would go much higher as soon as I could.


05-06-2003, 03:07 PM
Do you know where I could buy a 120vac in with 24vac @15-20 amp out transformer so I could make a 33.6 vdc power supply I cant seem to find one.