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General Mach Discussion / Spindle speed varies when moving axis
« on: March 06, 2011, 04:56:43 AM »
Hi All,
I've just replaced my CNC4PC 11G breakout board following a failure of the original.
When I move the axis (Z or X), the spindle speed increases. The amount the speed increases seems to depend on the speed of the axis, with about a 500 rpm increase when rapiding.
The problem was not there before the board failed, but that was about 18 months ago.
I have tried changing settings in 'ports and pins' for the X and Z axis as I recall that that might be a fix, but no joy.
I'm using the 0-10v analogue output from the 11G to a Mitsubishi VFD.
Has anyone experienced this problem or know of a fix?
Cheers,
Paul
I've just replaced my CNC4PC 11G breakout board following a failure of the original.
When I move the axis (Z or X), the spindle speed increases. The amount the speed increases seems to depend on the speed of the axis, with about a 500 rpm increase when rapiding.
The problem was not there before the board failed, but that was about 18 months ago.
I have tried changing settings in 'ports and pins' for the X and Z axis as I recall that that might be a fix, but no joy.
I'm using the 0-10v analogue output from the 11G to a Mitsubishi VFD.
Has anyone experienced this problem or know of a fix?
Cheers,
Paul