Will this stepper work?

[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]

Originally Posted by 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.

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]

Originally Posted by 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

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]

Originally Posted by 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.

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.

[kreutz]

Read this thread: http://www.cnczone.com/forums/showthread.php?t=25361