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Author Topic: Parts are being cut smaller than the gcode #s  (Read 5376 times)

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Offline BWP

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Re: Parts are being cut smaller than the gcode #s
« Reply #10 on: February 15, 2008, 01:25:06 PM »
I tried the automatic setter in Mach and for some reason it wont set it correctly, I have gone back to figuring it out by the gear ratio. Are the calculations the same for rack and pinion as for screw drives? also when you use inches, can I figure that my machine has 10,000 pulses per inch?
« Last Edit: February 15, 2008, 01:35:07 PM by BWP »
Re: Parts are being cut smaller than the gcode #s
« Reply #11 on: February 21, 2008, 11:59:29 AM »
hey, what if the gearing was done by a complete noob (like me) and now the axis move 10 mm insted of 1 mm at 200 steps/
is there another seting somwhere to lower the ratio? or i have to change the gears.
at 2000 steps/ it moves even further then it does with 200 steps.
when i jog i can move it less then 1 mm
« Last Edit: February 21, 2008, 12:09:34 PM by superbec »
Re: Parts are being cut smaller than the gcode #s
« Reply #12 on: February 21, 2008, 12:12:34 PM »
It's not just the gearing....You need to be aware of your stepper driver settings. Full, half, microstepping or whatever for the drivers you have.
Full step at 200 steps/unit is 1/10 the distance of full step at 2000 steps/unit.
RC
Re: Parts are being cut smaller than the gcode #s
« Reply #13 on: February 25, 2008, 12:36:40 PM »
so, i have 14,*********x steps/mm is that ok?