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General Mach Discussion / probe problems, mach 3 is acting wierd

« on: January 07, 2010, 05:16:25 PM »

  I have been experimenting with building my own touch probe, the first one was contact type, the second was the break contact type.  when running the first one the pin 15 was set to active high, and all worked well except the accuracy was awful.  the new one  i set the pin 15 to active low and while the led is off when not in contact, the mach 3 standard bed of nails routine behaves freaky.  it seems to choose its own feed rate, it's own z depth, it stops when making contact but who knows when that will be? i uninstalled and reinstalled mach i fiddled with everything that i could think of, but it still acts up.  so just for grins and giggles i reset the active high setting and ran the routine in the air,moved the contact with my hand and the routine runs along just as normal as ever until of course i release the probe.  so why in the world would the active high, active low setting have any thing to do with the way that mach executes g-gode???

The 3d scan plug-in has never behaved rationally, so i can't just switch to another routine.  My auto zero z plate also behaves stupidly in this state.  I have perused the forum, but haven't had any luck seeing anyone with this problem.

Any help here guys would be greatly appreciated