Hi, I have a heavily modified machine which is controlled with an Ultimachine Rambo board using the latest Simplyfi3D software on a Windows 10 machine.
I was using Marlin 1.0.0 for years with no problem but decided it was about time to install a proximity detector and bed levelling.
I upgraded to Marlin 1.0.2 and all went very well apart from a momentary grinding noise on the first movement ONLY of the Y and Z motors regardless of where the carriage is located - other than that - no problem.
So, I decided to upgrade to Marlin 1.1.6 - transferred all the settings and everything is working well BUT the grinding noise - which lasts at most 1/4 second - is now on the X and Z motors.
If I downgrade to Marlin 1.0.0 no grinding.
If I disable bed levelling in Marlin 1.0.2 or 1.1.6 - the noise persists
This is more of a nuisance than a problem - but I cannot locate any setting on Marlin 1.0.0, or 1.0.2 or 1.1.6 which would give me the results I get.
Any suggestion would be much appreciated.
Richard