an analog of linear feed of XY axes

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12 Sep 2009 03:40 #818 by Zig
Hello knowledgeable Gentlemen,

I have a requirement for a signal which would be representativeo the XY speed of the tool ( not velocity of the two axes) but actual speed of the tip of the tool as it moves across the work platten on my gantry mill.

I can easily plug into step pulse train of the two axes but that will not give me surface speed of the tool.

Is there a way of configuring the hal interface and outputing either a train of pulses whose frequency is the analog of the speed or else a fixed frequency variable duty cycle pulse train whose duty cycle is the analog of surface speed?

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12 Sep 2009 04:30 #819 by cradek
The motion.current-vel hal pin gives the velocity of the tool tip but it includes the Z component.

You can generate various kinds of signals from this using pwmgen or stepgen in velocity mode.

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12 Sep 2009 04:37 #821 by Zig
Cradek,

Thanks for the comment. I intend to use the Z axis direction flag as a gating signal anyway. Z axis component will be blocked out during Z axis moves.

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