Persistent Warping with PETG

[reynolds087]

with a 4mm nozzle I would be printing the part at a .3mm height and and extrusion width of .4mm
your first layer should be .3 just like every other layer when the staring height is correct.
Your bed should be 70 C
If using eSun petg the nozzle should be 230- 235C
Not knowing your part size speed should be slower than what you would print PLA

When you set up your printer there is probably some point when they tell you to put paper under the nozzle.. that would be manually setting you Z offset or starting height.

Within most slicers is a place where you can insert a Z offset positive and negative. Not sure which move the nozzle away from the bed and which moves it closer you will have to experiment of find documentation on the setting. I use a different method using the firmware M206 command.

What you will do is set your slicer as i suggested above with starting layer just like all the rest of the layers .3mm extrusion width .4mm if that is something that get set within your slicer.

Print the square and it should be 3mm +- .02mm so 2.98 - 3.02 mm tall
If not use that Z offset and make small adjustments until you achieve the proper height
Than print you part.

Also if you designed the part, go back and round the sharp edges, sharp corners increase the warping.

Thanks, I've been using the paper method. I looked for a Z offset on the stock firmware of the Maker Select v2 but not seeing it. I noticed my bed might be warped because I can't get all four corners leveled. Two of the opposing corners will be too low, and the other two are too high, which is impossible to fix. I got it as close as I can, and I also bought mirror tiles from Home Depot and used the hairspray method to stick to it better. I re-designed my part with 1mm discs around the corners and I am going to put a radius on the corners next time. It doesn't appear to be warping very much, but sometimes it doesn't happen until the end, and I still have about 40% to go, so I will check back afterwards. I can't find the setting for extrusion width in Slic3r. I will try 70C for the bed. I've been setting it to 100 and extruding at 250.

[reynolds087]

I can't believe how perfect this thing came out (relatively speaking). The radius on the corners was the last piece of the puzzle. That, combined with the glass surface and the helper discs on the corners was enough to produce a half inch thick plate with a flat surface and zero warping. Thanks for all the help!!!

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