Printing on Glass with your Prusa i3 MK2 – Ohhh So Smooth
Scott Smith

Last updated on March 5th, 2018 at 03:54 pm

Any of you that love printing on glass because of the beautiful “Smooth as glass” surface will love printing on glass with your MK2.

This short video will show you how easy it is by adding a few lines of code to your start up script within your slicer. I would recommend going to you’re hardware store with the measurements of your print bed and have a couple pieces cut by someone familiar with cutting glass and even have them smooth the edges to help prevent cracking and the possibility of cutting yourself.


You’ll also need a few chip clips or some method to hold the glass securely to the hotbed.

Follow along by watching the short video below. The Gcode for your start up script can be copied from the text display below the video.

Note: You must accurately measure the thickness of your glass and change the value in the gcode before running the script.

Update: I have also checked the bed temp with a laser thermometer and the temp of the glass is about 7 degrees cooler than the hotbed so adjust accordingly for your environment.

Start up Script Gcode

M300 S1567 P240
M301 P22.18 I1.27 D96.74 ; PID Tuning for your printer, you can delete this line if not used
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside printing area
G1 F600 Z+100 ; Raise the print nozzle out of the way
G4 P30000 ; pause for 1 minute
M300 S1567 P240 ; Play a Beep
M117 One minute remaining ; One minute remaining warning
G4 P30000 ; pause 1 more minute
G1 Z2.3 ; consider glass thickness Measure your glass thickness first
G92 Z0 ; Set absolute positioning for remaining print
G1 X60.0 E9.0  F1000.0 ; intro line
G1 X100.0 E12.5  F1000.0 ; intro line

Also worth mentioning, you can still run your live Z tuning once the print begins if you need to further tune your Z height.
You can also download my Updated Controller knob here that gives greater control of your display screen.


Here is a little longer video going over the steps so you’ll get a better idea of the process. It’s not as difficult as it may appear I just did a bad job with the making of the video.

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