Blob on preheat  

RE: Blob on preheat

Replace the first section (not all) of your startup gcode, which is found here:

With the following - it will set the nozzle to 150 degrees for initial preheat and calibration so it doesn't ooze. After calibration, it will ramp up to the correct print temp and start printing. Make sure you save the change.

M862.3 P "[printer_model]" ; printer model check
M862.1 P[nozzle_diameter] ; nozzle diameter check
M115 U3.9.1 ; tell printer latest fw version
G90 ; use absolute coordinates
M83 ; extruder relative mode
G28 W ; home all without mesh bed level
M104 S150 ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M860 S36 ; wait for PINDA temp
G80 ; mesh bed levelling
M109 S[first_layer_temperature] ; wait for extruder temp
G1 Y-3.0 F1000.0 ; go outside print area
G92 E0.0
G1 X60.0 E8.0 F1000.0 ; intro line
G1 X100.0 E12.5 F1000.0 ; intro line
G92 E0.0
M221 S{if layer_height<0.075}100{else}95{endif}

RE: Blob on preheat

Given you're on an MK3S+, you have a SPINDA, not a PINDA, so you can delete the line:

M860 S36 ; wait for PINDA temp

As the SPINDA doesn't have a temp sensor in it.

RE: Blob on preheat

Thank you! 
Will give it a try when im done running this bed level calibration prints. 
For some reason the right side comes out with a rough surface. Still not sure what's causing it..

RE: Blob on preheat

@kurt-3

You probably also need to modify line #3 in the above example to:

M115 U3.9.2 ; tell printer latest fw version

 -Matt

RE: Blob on preheat

I just moved the M104 and 109 down til after mesh leveling and put M104 150 in above mesh. Works just fine 🙂