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makerbot / ReplicatorG

An open-source gcode interpreter for driving RepRaps, Makerbots, and other similar CNC beasties
http://replicat.org
GNU General Public License v2.0
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Don't zero z-axis in end.gcode #113

Closed seibert closed 13 years ago

seibert commented 14 years ago

In ReplicatorG 0019, it appears that the ending gcode file rezeros the z-axis at the top of the print. As a result, at the end of every print the head thinks it is at (0,0,10). This annoyingly requires the user to rezero the head on the build platform by hand before the next print.

DaveDurant commented 14 years ago

I think this is actually in the start.gcode file but yeah, I agree. Removing that line makes it a lot easier if you're printing multiple objects.

seibert commented 14 years ago

Actually, that's a different thing. It appears that the offending lines in end.txt are:

G92 Z0 (zero our z axis - hack b/c skeinforge mangles gcodes in end.txt) G1 Z10 (go up 10 b/c it was zeroed earlier.) G1 X0 Y0 Z10 (go to 0,0,z)

Clearly there is some other bug being worked around here, but the current hack is not ideal.

DaveDurant commented 14 years ago

Oh.. I was looking at repg 18, which only has that in the HBP profile.

Still, both profiles have a "G92 X0 Y0 Z0" in start.txt, which resets the position (in memory, no physical movement) back to 0/0/0. That also means you have to manually mess with the position at the start of every print, which is what I think the point of this issue is.

ssd2 commented 14 years ago

There is a long standing bug in ReplicatorG that makes the firmware on the makerbot go insane if you don't start a print with a G92. The bug works differently depending if you are printing via serial or printing via SD card. This has irritated me for a long time, for exactly the reasons you have stated.

DaveDurant commented 14 years ago

They might have fixed that one, or at least lessened it. I commented out that G92 from my start.txt a month+ ago and it's been fine.. (of course now it will start freaking out, just because I said that..)

koenkooi commented 14 years ago

I've been using these start & end files for a few months now without problems: http://github.com/koenkooi/ReplicatorG/tree/koen/skeinforge/prefs/cupcake-hbp-makergear-035-abs-3.0mm/gcode_scripts

I left the warnings in, even if I can't reproduce the errors it is talking about

kintel commented 13 years ago

This is no longer an issue in the latest ReplicatorG using skeinforge 35.