Very very weird issue, looks like z wobble, but....
-
Make sure you've got all other confounding factors eliminated before trying to verify the wobble is gone. Tune your heaters, calibrate extruder, belts tight, lead screws lubed, etc.
-
I tuned my heaters, and calibrated extruders thrice to make sure. The usual checkups as you've mentioned at least twice. Also using sewing machine oil to lube my lead screws
. Wow I didn't know untuned heaters can cause wobble o.o. Will report on Monday. -
I didn't mean that it could cause wobble just that you want to eliminate any other factors that could show as issues.
-
Hi,
If you are content to manually level the bed you should be fine with 4 guide bars near the corners of the bed and two 8mm lead screws, one on each side of the bed at the center.
You can drive both lead screws with one motor using a belt.
Frederick
-
@Phaedrux ah okay, I got another problem though right now, I changed the layer height to 0.3mm in slic3r PE, and all of a sudden it start underextruding, the extruder turns at half the rate it's suppose to be. I didn't do anything to the esteps nor the firmware/config.g itself, I only changed the layer height from 0.4mm to 0.3mm and now it suddenly starts doing that. Changing just the layer height back to 0.4mm and it goes well again. What is going on?
EDIT: I noticed something interesting, in the file name in the duet ui, for the files layer height, for my suppose to be 0.4mm layer height, it says 0.3/0.4mm, but I'm sure in slic3r PE I didn't set any 0.3mm,
for the suppose to be 0.3mm layer height it says 0.3mm/0.3mm. What's going on here?
-
@iamthebest22 did you set the first layer height differently to the rest?
Can you post your gcode file so we can see what's up?
-
It's long, so I won't post it all here, but here are the two different gcode files:
0.3mm: https://www.dropbox.com/s/m7eyd5tk2uhhbt9/Circular cylinder for testing 0.3mm layer height.gcode?dl=00.4mm:
https://www.dropbox.com/s/1b97hv35gqxeelj/Circular cylinder for testing 0.4mm 200mm wide.gcode?dl=0no the first layer height is the same. for each.
-
G1 Z0.3 X1 Y1 F6000 ; move to prime position G1 E6 F60 ; prime 6mm of filamentThat's where it's getting the first layer height as 0.3mm from. It scans the file for the first relative Z movement.
One way to get around this is to move the nozzle prime gcodes into a macro, and then calling that macro with M98.
-
Oh I see, but does that have any actual effect on the printing itself? Because that doesn't explain why my extruder suddenly turns at half the speed at 0.3mm layer height and underextrudes but doesn't do it at 0.4mm layer height?
-
I can't see any differences in the slic3r settings from the end of your gcode files. They look identical.
The extrusion amounts are smaller in the 0.3 file compared to the 0.4 as you'd expect, but I can't explain the under extrusion.
What exactly does it look like?
-
I'm using a 0.6 nozzle, but I'm pretty sure they can print 0.3mm with no trouble. Well like I said, I am using a zesty nimble, so the motor has to turn fast, I noticed that from 0.4 to 0.3 when compared, the motor turns only half the speed, which shouldn't be the case. Here's my config.g part of the settings I'm pretty sure it's not that too. Could it be a bug in the slic3r PE itself? I haven't updated to the newest version still using 1.41.0:
M350 Z16 I1 ; Configure microstepping without interpolation
M350 X16 Y16 E16 I1 ; Configure microstepping with interpolation
M92 X79.00 Y79.00 Z1600.00 E2700.00 ; Set steps per mm
M566 X900.00 Y900.00 Z8.00 E240.00 ; Set maximum instantaneous speed changes (mm/min)
M203 X8800.00 Y8800.00 Z420.00 E6000.00 ; Set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; Set accelerations (mm/s^2)
M906 X1700.00 Y1700.00 Z1700.00 E1710.00 I30 ; Set motor currents (mA) and motor idle factor in per centEDIT: I want to confirm something, right now my precision piezo orion is set to -0.21 Z difference, I'm pretty sure RRF is different than how Marlin does it, if I make it -0.15 for example, that means the nozzle will be closer to the bed correct? and -0.25 would make it further (higher) from the bed?
-
Who knows the slicer. Anything is possible, but it doesn't look like anything is wrong with the gcode file.
your config looks fine too.
The trigger height in G31 tells you how far away the nozzle is from the bed when the probe triggers. So with the nozzle contact probes, and slightly negative value is normal and just means that the nozzle is pushing slightly into the bed (either into the surface, or compressing the springs, or moving it physically out of the way) when it triggers.
So a trigger height that is more negative means it is farther into the bed when it triggers. so -0.25 would be closer to the bed than -0.15.
-
oh shoot, so it's the same as Marlin then, crap okay so originally it was at -0.17, but it was too close to the bed, and I thought more negative means further, so I made it -0.21, so that's wrong? It should be -0.13 instead?
-
HAha, that's my understanding, but now I'm confused in my own head.
It would be easy enough to verify at the printer.
-
xD, well I'm doing the big circle 200mm dia, but just at 0.4mm due to the stupid issue print right now for the z wobble, I'll be running a probe repeatability test tomorrow, then I'll know for sure xD
-
Did the probe test, here's the results, right now I'm 6mm/s for the bed, is this result good enough, or should I slow the bed a little more?
G32 bed probe heights: 0.006 0.002 -0.003 -0.001 -0.001 0.004 -0.003 -0.003 -0.004 0.001, mean -0.000, deviation from mean 0.003
-
With a contact probe like the piezo I think you want some speed for the probe so that it has a good distinct trigger. Going too slow can cause problems.
-
oh cause I was at 8mm/s and people said that's too fast. hmm okay, but are my current results good?
-
Yes they seem to be pretty good. You can enforce a higher tolerance with the A and S parameters for M558.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_Set_Z_probe_typeThe A and S parameters control multiple probing. Probing is repeated until two consecutive probe attempts produce results that differ by no more than the S parameter; then the average of those two results is used. However, if the number of attempts specified by the A parameter is reached without getting two consecutive results within tolerance of each other, no further probe attempts are made and the average result of all the attempts is used.
-
ah okay good to hear, Btw my 0.4mm layer height 250mm circle produced no wobble, so I guess I'm good? Though I still need to figure out what the heck is going on with 0.3mm height underextruding...
