Prints 2 Layers Then Runs Off

I have the RepRap host software driving a SNAP-Arduino. (The GCode driver I tried for some reason couldn't heat up the extruder.) After testing my CNC bot and extruder, I hit "print" and got the first two layers layed down on my test model--

Then the build table shot off in the x direction until it hit the wall and started grinding.

Is this some automatic feature having to do with nose-wipe operations or something? It seems to happen reliably at the end of the second layer, regardless of the model I select.

Whoop-- newbieflop: Didn't run debug.

DEBUG: Start of cooling period
DEBUG: X axis - home reset

HOME RESET VERY BAD WITHOUT ENDSTOPS OH YES

Yeah, normally the host software does a X&Y minimum after each layer. Having any kind of endstop is a good idea

Alternatively you could hack the host software so it doesn't do any kind of "go to minimum" if you configure it to do so.

Edited 1 time(s). Last edit at 06/07/2009 06:28AM by Joachim Glauche.

Yeah, kind of wondering what I was thinking affixing the provided ethernet jacks to all my endstops-- those big cables really don't belong anywhere near this part of the machine. :B

Use those 3-pin headers/plugs you use to connect a fan to your PC motherboard or solder them directly. I never understood why to use those expensive RJ45 jacks for a part where you really don't need them.

And really, *shouldn't* have them. RJ45 cables are too heavy and bulky to do this job well. I /sawed off the ruddy jack/ and put in some header pins. I'm not about to mess with my motor boards (the most reliable part of the electronics I've got right now) so I took the RJ45 cable and slit it along most of its length and took only the three wires I needed in a bundle to the y-stage endstop. MUCH tidier.

Now if I can just get the software to play nice with it.......