[ezland00]

Hello all,
I need help to connect motors to my stepper motor control. The motor I have is Powermax II Model: M22NSXB-JDS-NS-02 and the stepper motor controller is Stepper3 ROC from stepper3.com. I am new to cnc stuff some please help me how to connect them together.

[ezland00]

anyone?

[kong]

I have no experience with that board, but the manual gives you the pin numbers for the parallel port. It gives info on the motor connections, which you may want to cross reference with the info on the pac-sci website. They provide a generalised installation guide which I think is suitable for all PowMaxII steppers, although you should confirm this yourself by having a look around their web site.

[ezland00]

How can i tell which pin in my motor is phase 1 out?

[ger21]

Go to page 54 of this:

http://www.xylotex.com/PacSciDS.pdf

Phase 1 is pin 6.
Phase 2 is pin 1.
Phase 3 is pin 8.
Phase 4 is pin 3.
Tie pins 2 and 5 together, this is you're phase 1 and 2 power.
Tie pins 4 and 7 together, this is you're phase 3 and 4 power.

I don't have this board, I just read the manual and the Pacsci .pdf above and this is what it appears to be to me.

Gerry

[ezland00]

Thanks alot man, you really helped.

[ezland00]

How can i find out the rated voltage on the motor?

[balsaman]

Usually written on the motor name plate. If the Amps and ohms are on there it's amps times ohms

Eric

[ezland00]

I only see the amps, there isn't any ohms listed on the label
.

[balsaman]

can you measure the ohms with a ohm meter? If so post it here and also the current.

Thanks

Eric

[ger21]

3.3A, 0.76ohm, = 2.5V when wired unipolar.

Gerry

[ezland00]

Is there any way i can lower the AMPs on the motor, because my control card only support up to 3.0AMPs, and the motor is 3.3 AMPs. Also is there any power supply that you can recommend to me that is 2.5v?

Thanks guys for all your help

[balsaman]

go here to learn about steppers in general and how to use them with power supplies above the motor rated voltage. Pay attention to the unipolar tutorial.

http://209.41.165.153/stepper/Tutorials/Tutorials.htm

With the right resistors you can run those motors at 3 amps and 24 volt powersupply.

Eric

[ezland00]

i am sitting here for more than 2 hours, but yet to finger out the right power resistor. Please help

[jimini]

hi
ezland00
Just do a google search for stepcalc102 you'll find a program to calculate the resistors.
I was'nt able to attach it but you'll find it..........................Jim

[ezland00]

Originally posted by jimini
hi
ezland00
Just do a google search for stepcalc102 you'll find a program to calculate the resistors.
I was'nt able to attach it but you'll find it..........................Jim

Thanks for the info. I wasn't able to find the program, but i'll keep searching for it. If anyone find the program please post it here.

[kong]

A quick google for stepcalc102 found me this:
http://www.cnclinx.com/stepcalc102.zip
Hope it helps, I didn't test it though!

[balsaman]

I wrote steppercalc. It's also available on my website here:

www.e-zflight.com/files/stepcalc102.zip

Eric

[ezland00]

Hey guys thanks for the links. I'm trying to get everything right, so please stay with me. As I said above, I am trying to get 3.3amp motors to work with my 3amp controller.
On the motor calculator
1. On where the motor amp is I should put 3amp right? (Since I wanted 3amp)
2. I am trying to use computer power supply, so the voltage is 5v or 12v right?
3. Will the computer power work for 3 of my motor at 3amp/each?

[balsaman]

1) right
2) right, probably 12 volts
3) probably not. If your motors are 3 amps each times two windings that's 6 amps per motor. You will likely need 3 powersuplies, one for each motor. Make sure your controller can use seperate power supplies for each motor. Do NOT connect the powersupplies in parallel.

Does that controller use FET's or transistors for output?

If transistors, I get 2.87 ohms at 25.8 watts at 12 volt supply

If you use 3 ohms, 25 watts resistors your motors will draw 2.9 amps. I would shoot for that. Put the resistors on a LARGE finned heatsink with a fan.

For FET's use a 3.3 ohm, 25 watt resistor.


Eric