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06-30-2019, 10:33 AM #1
- Join Date
- Jun 2019
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- 2
Printing with PETG - support material
Folks - I am trying to print with PETG on MakerGear M3. The issue I encounter at this point is the following:
- I have dual head printer and use PLA as my support material as this allows me to easily purge the support after piece is printed in PETG.
- The problem is that I had bad layer adhesion at the point where PLA support touches PETG. In other words, it looks like PETG does not stick to PLA and I get bad surfaces at those joint layers.
- I tried turning fan off at that transition layer but it lead to bad stringing. I also print at 150 mm/s which I like and not sure if increasing the speed further would help
Much appreciate any suggestions and alternative solutions to be able to print with PETG when I have to use support for overhangs
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07-01-2019, 07:16 PM #2
- Join Date
- May 2018
- Posts
- 567
I only have the M2 so I just use very low infill when I have to use support when printing with Petg as it is not suited for support as you know. I set my XY speed in S2D to 200 rather than the default 300mmS for non printing motion. This is where a lot of stringing happens. I also never print much faster than 50mmS if the part is not a large simple shape. Slower = less strings.
If using S3d, you may want to set your support to print 1 layer of 100% dense support this will give the PETG a smooth surface to land on and make sure your upper vertical separation is not set more than one.
Good luck!!
I never use a fan when printing with PETG
Recently I have starting using Makergear brand ABS in place or PETG if the part will not be outside or exposed to sunlight.
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07-02-2019, 04:29 AM #3
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07-03-2019, 09:23 PM #4
- Join Date
- Jun 2019
- Posts
- 2
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07-04-2019, 06:58 AM #5
one thing to bear in mind is that printer manufacturers still quote 'top speeds' that are just not practical for printing.
Plus different metarials need different print speeds.
Pet-g doesn't like to be printed much beyond 50mm/s.
Pla will print as fast as your machine can manage.
Printer will print perfect...
06-14-2024, 10:44 AM in Tips, Tricks and Tech Help