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Print bed 0,0,0 offset from machine 0,0,0

Posted by WZ9V 
Print bed 0,0,0 offset from machine 0,0,0
October 23, 2016 01:32PM
I have a Wilson II and it uses a rack and pinion system to deploy the z-probe switch. Because of this system the machine 0,0 deploys the probe, so the bed 0,0 needs to be offset by about 10 to 13 mm in order for the probe not to deploy when at the bed 0,0 position. Is there a way to configure the firmware so the the bed 0,0 is different from the machine 0,0?
Re: Print bed 0,0,0 offset from machine 0,0,0
October 23, 2016 05:16PM
0,0 ??? Do you mean (X,Y)=(0,0)?

Probably you should investigate Z_SAFE_HOMING. And then get your PROBE_OFFSET_FROM_EXTRUDER and Y_PROBE_OFFSET_FROM_EXTRUDER numbers correct. Probably that will address your issues.
Re: Print bed 0,0,0 offset from machine 0,0,0
October 23, 2016 09:07PM
Yes I mean (x,y) = (0,0)

This is not a probe offset issue. Let me see if I can explain it better.

For the probe to deploy you need to move to X = 0 so that the lever can be used to lower the Z probe. Because of that the printable area actually starts at X = 13 so that the lever can clear the plate on the side that triggers the Z probe.

Here is an animation of the setup.
[github.com]

I have it working, but I want to make it so that when the slicer sends (0,0) it translates to (0,13) on the machine based on the above example.
Re: Print bed 0,0,0 offset from machine 0,0,0
October 24, 2016 09:20AM
The simple answer would be to configure Slic3r to know you don't want it to print at (X,Y)=(0,0). It will assume everything is shifted away from that coordinate.
Re: Print bed 0,0,0 offset from machine 0,0,0
October 24, 2016 03:22PM
The following may be what you need. The negative value tells Marlin the endstop is -13mm from 0 of the bed.

In configuration.h:
// Travel limits after homing (units are in mm)
#define X_MIN_POS -13
#define Y_MIN_POS 0
#define Z_MIN_POS 0
Re: Print bed 0,0,0 offset from machine 0,0,0
October 24, 2016 06:05PM
That sounds like what I'm looking for. I'll give it a try and report back. If it works I know it will make several people in the Wilson II forum happy.
Re: Print bed 0,0,0 offset from machine 0,0,0
October 26, 2016 09:29PM
It appeared to work as expected on the Y but seemed to ignore X. Accordingly to configuration.h it's version 1.0.4-mjr it's Marty Rice's repo for the Wilson II.
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