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Author Topic: Incorrect spindle RPM  (Read 1694 times)

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Incorrect spindle RPM
« on: November 29, 2014, 01:12:19 PM »
Hi guys,
I have been searching for a couple of days thru the forum to try to figure out my issue but I have been unsuccessful.
The issue that I am having is that I can not get the appropriate RPM to match Mach3.
Hardware: G0704 mill, C35 BOB, C6 Speed control.
Motor timing: motor pulley 32 tooth, spindle pulley 40 tooth
Mach3 pulley setting: min 100, max 4350 ratio 0.8
Motor tuning: 1000 steps, Max velocity, Step pulse 3
Spindle setup: I have checked Step/Dir motor

I can set the max rpm correctly to 4350. If I set Mach3 to 3000 rpm my tach reads 2800. At 2000 rpm the tach reads 1600. At 1000 rpm the tach reads 650.

Any advice will be greatly appreciated.

Thank you,