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Topics - flenser

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Not sure if this is the right forum. I'm trying to generate some pretty basic output from Bobcad-Turn, and what looks like a normal tool path in Bobcad has all sorts of extraneous movements in Mach. Bobcad support calls it "Crop Circles" and they seem to think it has something to do with my Mach setup, since it doesn't show up in their sim. I can repeat the results with a default Mach3 install, though. They suggested I post Bobcad's output here to see if anyone knows what is wrong with it. I attached the output and a pic of what Mach sees when I load it. Thanks in advance - Jeff.

General Mach Discussion / lathe threading problem - ghost trigger
« on: February 27, 2010, 10:15:02 AM »
Sorry if this has been covered before. I spent a while looking for related issues without success. You can probably skip over all but the last two paragraphs. I don't think the problem has anything to do with my wiring.

I started with the CNC4PC index pulse card, and setup the index with a slotted disc pretty much as described. I mapped it to an input port, enabled the spindle output (not sure why this is required), and entered an m3 command. The spindle RPM reads correctly.

The code produced by the threading wizard, however, appears to start each pass without waiting for a pulse. I thought I might have a noise problem, checked the signal with a scope, but it looks fine. I then switched to using a hall effect sensor I had laying around, and while the RPMs still read correctly, the gcode from the thread wizard still starts seemingly without waiting for a pulse.

OK, I mapped the index input to the estop input to make sure it stayed off, disabled the spindle output, turned off the spindle: true RPM reads zero. I run the code output by the wizard in diag mode, and the index led remains off the entire time. I see the wait for trigger led come on, then go off and a thread pass is started. Where is it getting the trigger?

I started with the latest version, but removed it and installed version 033 based on recommendations in numerous threads.

Thanks - Jeff

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