Thread: Help! Stepper control board
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26-05-2009 #1
Hi All
I need some help please. Im trying to reuse the control board from the machine that I got the motors from to use on the drill/mill conversion and to get some cnc experience.
Im keen to reuse it because it appears to be good quality (german) and when it was running I couldnt stop the motors by hand so seems to be powerful.
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The circuit is a common design, it uses a L297 contoller and L6203 amp section then ultra fast diodes on the output. but then it seems to go into a relay bank before the output which is confusing me, As i understand steppers are driven by controlling current? Is this working at full power all the time then? and as the relays are 5amp dose the meant i can run a bigger motor for the Z axis?
Input shouldnt be a problem as I think i can remove the optoisolators (3 white chips lower left) and tap into the drive section direct.
Cheers for any help
Ross
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