Waves on printed parts

Dear all I was changed to an Octopus, and last Marlin version, coming from an old small board, and just one step previous Marlin version, using 2 mm advance lead on Z axis, as before, and now this effect appeared, any idea?
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19 Replies
Helge Keck
Helge Keck2y ago
print the cube with 200% size if the waves have the same height its most likely z-wobble, if the waves are smaller its probably the extruder
conventional-tan
conventional-tan2y ago
I'll try , the extruder it's an Orbiter 1.5 and is giving me some headache
Helge Keck
Helge Keck2y ago
why? its a good extruder
conventional-tan
conventional-tan2y ago
I think it's a good extruder too, I was too fast in my last answer, I did the cube, and some more taller, with same results, waving, I was even tried to change extruder flow, as in the picture, from 50 to 100%, results are always the same, referring wobbling, I'm using linear guides, in X and Z, I was tried using rigid couplings, flexible couplings, with and without ball, brass nuts, pom nuts, y changed motors for more powerful ones, I changed leads, I changed drivers on board, and of course, thousands of firmware changes, I have ball bearings in the leads tips just to avoid mechanical wobbling, I designed more robust motor holders, the plan for today is to change the drivers model for a 2209, currently I have 2208, just reading, looks like related with last Marlin version, if I have no success changing drivers, I'll change back to 8 mm lead instead of two
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Helge Keck
Helge Keck2y ago
what printer is this?
conventional-tan
conventional-tan2y ago
A new one designed by me It's not the first I make
conventional-tan
conventional-tan2y ago
Helge Keck
Helge Keck2y ago
ok, then its difficult to help you, i know the typical v-core issues but dont know your system at all
conventional-tan
conventional-tan2y ago
It's a common bridge design, but stronger
Helge Keck
Helge Keck2y ago
do you use bearings for the leadscrew constraint on the top?
conventional-tan
conventional-tan2y ago
Of course, 608
Helge Keck
Helge Keck2y ago
remove them and print again just to rule something out
conventional-tan
conventional-tan2y ago
Good point, I'll try
conventional-tan
conventional-tan2y ago
Dismounted
No description
conventional-tan
conventional-tan2y ago
Same behaviour, no changes without them
miklschmidt
miklschmidt2y ago
This looks like the classic watermark bed issue. Switch to PID
conventional-tan
conventional-tan2y ago
I have PID, now, looks much better, mechanical misalignment I suppose you mean PID on heating? I will try to find any other pid
Helge Keck
Helge Keck2y ago
i think he is talking about the heating control of your bed, do you use watermark or pid, and if you use pid have you done apid tuning already? assuming oyu use klipper it should look like this [heater_bed] control: pid . this would be the possible issue [heater_bed] control: watermark
conventional-tan
conventional-tan2y ago
Yes , I always use PID in both, bed and nozzle, and once finished the machine I always include the PID values inside Marlin, compile again, and upload this last version, with PID values included to the printer
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