Re: [CAD_CAM_EDM_DRO] Stepper Motor Driver

Hi,

I was going to use this driver with 50oz motors of 1 amp using a power
supply of about 20 volts. The machine would be quite small for
drilling/routing circuit boards.

Speed is not really an issue but I wouldn't want o wait all day for it to
finish a job. I thiught it was a cheap alternative to proper drivers.

Regards,

Terry


| Blue wrote:
|
| >Hi,
| >
| >I thinking of buying this kit in the link below. Could one of you
| >electronics people look at the link and tell me if I need resistors in
| >series with the motor connections and if so where and what sizes and
| >wattage.
| >
| >http://www.electronic-kits-and-projects.com/kit-files/3000/3179.pdf
| >
| >
| This drive will operate the resistance-limited motors found in floppy
| drives,
| etc. It is of no use on any motor above size 17, as it will self
| destruct due
| to the motor's inductance, which they made no provisions to handle. You
| will also have to supply very large (100 Watt+) resistors to limit motor
| current. The performance of this driver will be abominable at any speed
| above zero. You will be lucky to get it up to 60 RPM before the motors
| stall.
|
| Jon