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Marlin firmware hangs on g2 g3 (laser cutter retrofit)

Posted by devnull 
Marlin firmware hangs on g2 g3 (laser cutter retrofit)
May 21, 2013 02:53PM
I have recently replaced the awful stock electronics on a cheap Chinese laser cutter with a Sanguinololu 1.3a running Marlin 1.0.0 RC2
The only modifications I've made are:
    Selected correct board in configuration.h
    Set correct board dimensions etc.
    Enabled fan on pin 4 (for laser control)
    Inverted the fan output for the laser

I can load g-code into repetier host and get it to cut quite happily.
However when I try to send an arc with a G2 or G3 the controller hangs with "waiting for 1 command" indefinitely. :-(

Any ideas on how fix or troubleshoot further?

Edited 1 time(s). Last edit at 05/21/2013 02:54PM by devnull.
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