Keep Crashing my Z-Probe

[Jimustanguitar]

Hey Guys! I'm zeroing in on being able to use Rollie's OpenDACT program. I didn't want to spam his thread because it's already pretty long, and I'm pretty sure that my issue is unrelated.

I have a mechanical Z-Probe (http://www.thingiverse.com/thing:1069281) and it's wired to the extra Z endstop, Z-min, in this case. I've wired the probe up NC and NO as a test, and I've also tried it both ways with the value inverted in the firmware.

I'm using Repetier 0.92. I started with a configuration that I found on this forum, and it looked right. I made a slight change to account for my thermocouple board, and gave it a try. Here are screenshots of my current settings. Know that I've danced back and forth on the "Probe triggers on high (Z_PROBE_ON_HIGH)" setting, and the screenshot is just a sample of the most recent way I tried it.

http://i.imgur.com/XDFWzVj.png
http://i.imgur.com/NuWi623.png

With everything wired and installed, I can send G31 and see low in the log, then I trip the switch and send G31 and it says high. Just like it's supposed to. Either changing from NC to NO or ticking the box mentioned earlier will invert this logic.



Anyway... Everything seems right. When I run a G30 or I run Rollie's program, it just crashes. Skipping belts and jamming the switch into the glass. I've tried it multiple ways, multiple times, and I just can't seem to get it right.

What am I missing? Why isn't my Z-Probing working?

Thanks in advance.

[jason128]

Is open fact slowing down to probing speed? Or is it hitting at full speed.
Try increasing the probing distance to say 100mm and see if that works

[geneb]

Did you issue a G28 first?

g.

[Jimustanguitar]

I did send G28 first, it also seems to be part of the probing sequence when manually entering G30.

The OpenDact program homed the machine and started about 40mm off the bed (I set my Z0 on the LCD screen first, but that didn't seem to make a difference) and then it probed several points in the air, moved down slightly and did it all again - and after a minute or two of this cycle, it finally worked its way down to the bed and started crashing into the glass.

It doesn't seem to slow down before hitting the bed, but it's not a full on travel move either. How fast is it supposed to be?

[geneb]

That's very, very, strange. Your steps/mm didn't get mangled somehow by chance?

g.