[kenny1]

Last summer I bought some stepping motors at a local flea market.

These are eight wire 2 phase 6 volt motors, and their labels say on them 'Vexta Stepping Motor Model PH266M-E1.2'. These have a four bolt mounting pattern about 47mm center to center and a 6mm shaft.

Will these work for an axis drive motor, and if so where can I get a controller to run these?

Thank you,
kenny1

[Lionclaw]

Couldnt' find a datasheet, but it looks like someone else paired it with a Gecko driver. I believe with 8 wires you can wire it for unipolar or bipolar.


http://www.luberth.com/cstep/myhardware.htm

[dertsap]

those motors are probably around 100oz-in unipolar, this is the new substitute for that motor which is normally more powerfull than the one being replaced

PK266M-E2.0A
PK266M-E2.0B
Bipolar (Parallel)166 oz-in
Bipolar (Series)166 oz-in
Unipolar 127 oz-in

[kenny1]

I can see why the ones luberth.com used got hot - it's sorta expected when you power a 6 volt motor with 60 volts.

I went to orientalmotor.com for more information, and the website said there is no info on these because they are discontinued. These steppers have a weird wire color code - black, yellow, red, orange, and then the same colors striped on white wires for a total of 8 wires. I want to use these bipolar if possible, power is no problem.

I am going to try these on a Z axis and see what I get.

Thank you,
Kenny1

[GaryCorlew]

the recommended voltage is 20 - 25 times the motors voltage, 10 times the voltage is no problem at all using a modern chopper drive

[kenny1]

I didn't know that you can put so much voltage into a stepper, I have so much to learn.

Where can I find out how much stepper torque I will need for each axis of a machine? I want to use one of these steppers for the Z axis, maybe one for the
Y axis and two for the X. My machine will be roughly 18"x24" or 18"x36"

Thank you,
kenny1

[ghimpe--]

Hello.

I have some 6 wire stepper motors from some old printers. Model: STP-57D101-01, 1,8DEG/Step 3.6V 0.8A.

If i understood corectly from the above posts it should be safe to power them with a much higher voltage. I was thinking 24V. Is this safe or I missunderstood.

And what are the implications in over powering a steper motor? Will it rotate faster? Will it have more power?

Sorry for such noob questions but i'm new to stepper motors.

PS: Realy nice forum, i'll stick here for a while hoping to make me an wood 3 axis CNC.

[dertsap]

heres a wiring diagram i think should match up for your motors

[kenny1]

Thank you dertsap, your diagram is the exact one I needed. I had given up looking for the info, and Oriental Motor wouldn't give me one.

Definition of the word 'bummer'... the guy I bought my motors from had lots of them, and I got his phone number. Now I can't find it.

Kenny1

[dertsap]

oriental motors doesn t give out info if the motors are specific to one product or company
i've tryed before , and their reply was to check with the company which produces the product the motor came out of

[ghimpe--]

Could somebody please answear my question posted above? Please!

[Jason Marsha]

Hello.

I have some 6 wire stepper motors from some old printers. Model: STP-57D101-01, 1,8DEG/Step 3.6V 0.8A.

If i understood corectly from the above posts it should be safe to power them with a much higher voltage. I was thinking 24V. Is this safe or I missunderstood.

And what are the implications in over powering a steper motor? Will it rotate faster? Will it have more power?

Sorry for such noob questions but i'm new to stepper motors.

PS: Realy nice forum, i'll stick here for a while hoping to make me an wood 3 axis CNC.

Yes you can use 24 volts without a problem. Steppers are powered with 15 to 20 times the their rated voltage. So even if you go up to 36 volts you will be fine. The key is not to exceed the rated current.

Jason

[ghimpe--]

Thanks Jason for your reply.

"The key is not to exceed the rated current."

They are 0.8A, so i'll have to limit them to not draw more than that? I'm not sure i know how to do that, but i'll google arround.

[Jason Marsha]

Thanks Jason for your reply.

"The key is not to exceed the rated current."

They are 0.8A, so i'll have to limit them to not draw more than that? I'm not sure i know how to do that, but i'll google arround.

When you are ready for the electronics you can try hobbycnc.com.
I bought my first stepper drivers from them and they are excellent quality.

Jason

[kenny1]

I get it now... You can raise the volts to the stepper as much as you need to, just as long as you don't exceed the stepper's rated current draw. But, you would think that the higher volts would increase the stepper's speed but decreasing in amps to compensate for the higher volts would lower the available torque.

Kenny1

[Madclicker]

You increase the voltage to increase the speed at which the current rises in the motor coil. This increases the speed at which the motor will run without stalling. You limit the current to what the motor rating is, regardless of what the voltage is.

You don't want to supply over about 20X the rated voltage or needless motor heating can occur.

[kenny1]

I wonder... is there a way to keep the motor cooler? I saw vacuum tubes once in a ham radio with clipon cooling fins on them to dissipate heat.

Ken

[dertsap]

I wonder... is there a way to keep the motor cooler? I saw vacuum tubes once in a ham radio with clipon cooling fins on them to dissipate heat.

Ken

if you have a surplus type store nearby you can use pc type of fans and mount them over the motor , ive got a surplus store nearby and bought a wack of em for my drives and motors

[kreutz]

Hello.

I have some 6 wire stepper motors from some old printers. Model: STP-57D101-01, 1,8DEG/Step 3.6V 0.8A.

If i understood corectly from the above posts it should be safe to power them with a much higher voltage. I was thinking 24V. Is this safe or I missunderstood.

And what are the implications in over powering a steper motor? Will it rotate faster? Will it have more power?

Sorry for such noob questions but i'm new to stepper motors.

PS: Realy nice forum, i'll stick here for a while hoping to make me an wood 3 axis CNC.

It is safe only if you have a current limiting controller (Resistive or Chopper type), Otherwise you will trash them. They will overheat and saturate magnetically, could also demagnetize the magnets.

[ghimpe--]

kreutz, i've been looking on the internet for DIY choppers. When i will finaly make one, i'll post it here, but that could take some time, i'm realy busy right now and it seems that i'll be even more busy in the next couple of months.