So....I switched to ABS and Aquanet on the Glass bed.

3D Printing
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So…I switched to ABS and Aquanet on the Glass bed. I’m EXCEPTIONALLY happy with the first layer or two it lays down. :slight_smile: I expect my feeding problems will be greatly improved when I get real screws applying pressure on the filament feeder (currently using zip-ties as M3x30mm aren’t available locally)

A test print of the mount for the LCD panel shows that 80% of the build surface is being reached and covered (not perfect, but surprisingly good)…but I’m hitting my head on MAXTEMP (255) which has the print failing poorly. The print temp is set at 245, but there’s some hysteresis and it appears to be touching 255.

Suggestions?

(And I’ve been covering some SERIOUS ground with my Raspberry Pi and Octoprint, so with all the set backs, there’s been a lot of ground covered. )

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I presume that the MAXTEMP you are referring to is in configuration.h of Marlin. Farther down you will find another set of parameters defining your PID, Hysterisis, and a maximum for extruder temp which triggers an error 0. I recall the default is 275. Do an PID Autotune on your hotend and plug those values into configuration.h or your Start gCode to test.

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Cool, I was hopin’ like hell 255 wasn’t a mathematical limit! :slight_smile: Would the autotune measurements vary based on the material in the extruder?

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@Mike_Miller No, it just tunes the control loop for the heater, optimizing response. So if you suddenly on layer change start pushing more filament/sec the hotend will respond quicker/better keeping the temp closer to the setting.