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Re: Printed part has bad X-axis shift, generally poor print

Posted: Sun Jun 21, 2020 12:29 am
by paynterf
So far the print with airscape settings is looking pretty good!

Re: Printed part has bad X-axis shift, generally poor print

Posted: Sun Jun 21, 2020 2:07 am
by paynterf
Print finished beautifully - thanks airscape! Would you mind giving us your thoughts on *why* the settings you developed work so well for PETG? They seem a bit counterintuitive, especially the 'no cooling' part

TIA,

Frank
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Re: Printed part has bad X-axis shift, generally poor print

Posted: Sun Jun 21, 2020 4:14 am
by airscapes
I had read that in the eSun specs someplace and on different websites when I started with PETG. I don't use it for anything but mechanical items that need to be strong yet flexible, they are normally simple shapes. I do make a cover for a knife sharpener strop that is a single .8mm wall using the .75 nozzle that turn out great with PETG. These print sequentially at 15mmS with no retraction.
They look bumpy but that is just the strip of LEDs reflecting off the shiny PETG
I think most of your issues was probably printing too fast with to much extrusion multiplier. Just compare what you had done with what worked.. retraction would not cause the problem you had.. but speed. too much plastic and the wrong heat.. not sure what temp you were using when you had failures but look hot to me.
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Re: Printed part has bad X-axis shift, generally poor print

Posted: Sun Jun 21, 2020 5:57 pm
by paynterf
wow! Nice setup!

Frank

Re: Printed part has bad X-axis shift, generally poor print

Posted: Tue Aug 04, 2020 11:11 am
by Mach
airscapes wrote:
Sun Jun 21, 2020 4:14 am
I had read that in the eSun specs someplace and on different websites when I started with PETG. I don't use it for anything but mechanical items that need to be strong yet flexible, they are normally simple shapes. I do make a cover for a knife sharpener strop that is a single .8mm wall using the .75 nozzle that turn out great with PETG. These print sequentially at 15mmS with no retraction.
Thanks for the advice airscapes. Changing my bed to glass and using sequential printing has made a big difference in my workflow. :D

Re: Printed part has bad X-axis shift, generally poor print

Posted: Tue Aug 04, 2020 4:55 pm
by paynterf
Thanks for the time you've put in on this topic, and for the demo model.

I printed the model. height = 2.92mm, wall thickness = 0.90, width = length = 16.74

Frank

Re: Printed part has bad X-axis shift, generally poor print

Posted: Tue Aug 04, 2020 8:00 pm
by airscapes
paynterf wrote:
Tue Aug 04, 2020 4:55 pm
Thanks for the time you've put in on this topic, and for the demo model.

I printed the model. height = 2.92mm, wall thickness = 0.90, width = length = 16.74

Frank
So what that is telling you is your starting Z offset is too close to the build late and the maybe the extrusion multiplier need to be reduced.
This is not terrible if you want to leave it, just means your bottom layer will be squished out a little and parts will be a bit fatter. Also part may be hard to remove from the build plate. I would reduce the M206 Z by .08 of what it is currently set to, save and reprint. Not sure how that works on a M3 so proceed with caution.:-)