Strange behaviour of G29 command

I have built and calibrated a 3DR printer. after a while I got interested into auto bed levelling using FSR so I bought 3. I connected them to RUMBA ZMIN endstop, configured the endstop to use the pull-up resistor and checked it worked by manually pushing on the print bed and confirming the FSR triggers the endstop. everything seems ok, so I enable auto_bed_levelling on the firmware.
at first It throws a compile error regarding some variables not defined (ABL_PROBE_PT_....). I found the variables in the NON delta configuration.h so I added those in the delta version of the configuration.h and it compiled.
after uploading, I homed (G28) and everything work as expected.
as soon as I sent G29 only one motor (the one connected to the Z motor driver) started to move down, the other 2 stayed still, throwing the effector completely out of the printer. it was as if it did not know it was dealing with a delta printer and just tried to move down the Z axis.
another strange behaviour was when sending G30. this time the effector went down correctly (all axis moving down) , hit the bed and stopped, setting the current Z to 196.3 (my Z_HOME_POS is 163.3). I was expecting it to set the Z to zero when hitting the bed...

Does anyone have a clue?

Thanks

I have the same problem . Cause is that you have firmware that does not have autolevel configured for delta machine. As far as I can tell, this firmware has support. If you check function "run_z_probe" in "marlin_main.cpp", there should be an "#ifdef delta" in it. If it is not in your current software, then this is the cause.

Thank you for the answer. I have been looking into Marlin_main.cpp for a couple of days days now and I had the same suspect. then I did try the firmware you are linking, it's kind of working but i have to hook up the FSR output to the bed thermistor pin, which I would rather not, because with the ZMIN pin works just fine... now I have a working setup to experiment... I'll try to figure out if I have any improvement over the manual levelling and decide if I want to keep it or not....
I thing I'll keep this setup until the main MARLIN firmware incorporates the support for autoleveling on deltas.


Thanks
A,

Use Rich Cattell's software. It offers auto calibration, auto bed levelling and a very enhanced M666 functionality.



[github.com]


[groups.google.com]

Andy

The problem is that Rich's and Johann's firmwares are both out of date. The actual Marlin firmware is beeing updated all the time. I have a bad feeling when the firmware for such a fast moving tech like 3d printing has not been touched in almost an year...