@tinken Solved. 'Has Filament Runnout Sensor' was set in Hardware when not set in printer firmware. This resulted in MC stopping for the trigger.

Many thanks for the feedback. I would not like to stop using Mattercontrol as nothing else comes close in performance.
Can you send an invite to discord as I cannot find you there?

@tinken It appears to send an M119 to the printer at around the same time as the pause in the print. Is this likely to be causing the motherboard to stop printing whilst it sends a report on endstops then continues printing?

Hi Tinken, thanks for coming back. Yes I have modified Marlin 2.1 for BLtouch. The probe triggers correctly on ABL as well as G28. It prints perfectly using Cura 5.0 usb connection. It only stop/starts when printing directly from Mattercontrol. I have rolled back to older versions of Mattercontrol and all exhibit the same issue.

As requested, many thanks. I have been running from PC direct through USB for many years.

Start:
G21 ;metric values
G90 ;absolute positioning
;M82 ;set extruder to absolute mode
M107 ;Fan off
G28
;M420 S1 ;recall bed mesh
;G90 ;absolute positioning
G1 X0 Y0 F3000
G1 Z0 F500 ;Home
G1 X70 Y2 Z0.2 F3000 ;move to start of purge
G92 E0 ;zero the extruded length
G1 X180 F3000 E15 ;extrude 15mm of feed stock
G1 Y5 Z1
G1 X0 Y5 Z1
G92 E0 ;zero the extruded length

End:
G91 ; relative movements
G1 Z20 F5000 ; lift nozzle
G90 ; back to absolute
G1 Y200 F6000
M104 S0 ;Heater shutdown
M107 ;Fan off
M84 ;Disable motors

Just installed and set up a 3Dtouch on my home-built Prusa. I can get ABL to work well but printing has become a problem. Each print starts then stops every few seconds and then continues. Having checked the Terminal, the motherboard is running an M119 every so often and reports the endstops back to the PC. This appears to coincide with the print stop/starting. The setup worked fine with the original Pinda and steel sheet, but I wanted to change it to a textured glass for better adhesion. This seems to be unique to Mattercontrol as I have tested an identical print with Cura as the host and it prints straight through without stopping.

Tech info:

Prusa Mk3 clone, 3Dtouch, BTT SKR1.3 motherboard, Marlin 2.1, Mattercontrol (slicer)

When setting the part cooling fan speed to a percentage it randomly resets itself to 4.7% during the print. This can happen even when the fan slider is off or no number is inserted. It is also difficult to enter a number in the box as random extra decimal places appear off the screen area.

HI

I am using a Prusa I3 Mk2 upgraded clone with Ramps 1.4, A8994 drivers and Mattercontrol.

Recently, after printing perfectly for days, the z axis has started ticking and slowly moving upwards before a print. This only happens between pressing the print button and the hotend moving to its print position.

I have tried:
1. Swapping drivers
2. Setting a lower Vref
3. Checking ease of movement of screw threads

The result is a random Z offset and prints not adhering to the bed.

This does not occur if I export the gcode file to SDram and insert it into the printer. It prints normally

Anyone had the same?

Recently when starting the program I am getting an extra stl file loading at the bottom of the queue. It is always the same file which is one I designed some time ago. If I re-start without deleting it, I get another identical copy below it.

I don't really want to reinstall the program without losing all the setup I have.

Not important, but niggly.

Solved it!

I needed to set :

Print Area, Print Centre - 0,0 It was set - 100 100

General, Centre Print - OFF It was set - ON

Now prints in the centre of the bed.