Delta effector constant tilt
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Hi there,
I bought a smart effector and today i assembled it to my anycubic predator. Now i noticed that the effector has a constant tilt (not parallel to heatbed). The part cooling fan is touching at one side the heatbed. But this is constant across the heatbed.
I have read the delta calibration but don't know where to look because it is a constant tilt. Also there is not given in which dimension the build has to be accurate. For example does the tower distance has to be in within +-1mm or +-0.01 or less? If i put a metal angle between a tower and the heatbed i can't see a gap (all 3 towers). So i think they are perpendicular... I installed magball arms with linear rails. With stock effector i couldn't see that tilt.Does anyone have an idea what's the problem and how i can fix this?
Many thanks for your help
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post your config. config overwrite and bed.
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@Veti i can't because i don't have a duet wifi board. I want to use just the smart effector to save weight and better fit the magball arms.. if this will justify i will upgrade to the duet.
I tested the tilt without powered electronics. Just installed the whole hardware. If i move the effector by hand i see the constant tilt with bullseye level...
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post some photos?
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you will need to do a delta calibration in any case. even if you are not running duet.
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@Veti i know but even not powered on and not calibrated printer must be not tilted. How should it work when fan duct touches on one side the heatbed? Photos will follow
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@Phaedrux done
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@PuddingBaer91 Just to make sure, is your printer itself level with respect to Earth? If that's not the case the effector might still be perfectly parallel to the bed, just not to Earth
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@Veti said in Delta effector constant tilt:
you will need to do a delta calibration in any case. even if you are not running duet.
@PuddingBaer91 said in Delta effector constant tilt:
@Veti i know but even not powered on and not calibrated printer must be not tilted. How should it work when fan duct touches on one side the heatbed? Photos will follow
You need to calibrate so that the printer "knows" where the endstops are. Take the blower off and calibrate it.
My best GUESS (and it's only a guess) is that you have one endstop slightly higher or lower than the others. If that is the case, and the printer is assuming that all the endstops are at exactly the same height, it could result in tilt of the effector.
Once the printer firmware compensates for the end stops (again, assuming your firmware can do that), then it should level out.
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@garyd9 okay but i can't imagine how calibrate can change the tilt. With my hands i can't push the effector to be not tilted. The effector keeps it plane. It's not necessary at which height the carriages are the effector plane (tilt) is fixed... May i try to calibrate tomorrow but can't imagine it helps...
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@garyd9 said in Delta effector constant tilt:
My best GUESS (and it's only a guess) is that you have one endstop slightly higher or lower than the others. If that is the case, and the printer is assuming that all the endstops are at exactly the same height, it could result in tilt of the effector.
No matter how you move the axis on a Delta printer, you CANNOT tilt the effector.
So it's for sure something wrong in the geometry of the build that's causing this tilt.
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@alankilian said in Delta effector constant tilt:
No matter how you move the axis on a Delta printer, you CANNOT tilt the effector.
I'd love to argue with you about that (considering that my primary printer is a delta and over the years I've managed to see more than my fair share of problems with it,) but it won't help the OP. (Though, to be completely honest, I did go through a month when everything was so screwed up on my printer that I thought I was a poster boy for "what can go wrong" or "what not to do.)
Looking at the pictures posted (the last one in particular), it almost appears that the hot block is mostly level with the bed, but that the fang cooling thing isn't quite straight. (That might just be an optical illusion, however.)
Are you able to take a picture of a entire printer to give us an idea of the frame construction?
"I'm not saying that you are wrong - I'm just trying to fit it into my real world simulated experience."
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@garyd9 thats it. Many many thanks for your help. Great idea to look at the heater block level. Mine is level:
So i looked to the part cooling fan and i noticed it is not really flush with the fan on this side where it touches the heatbed.
Never ever thingiverse parts.. the duct is mounted in a very bad way (only one screw at one side)
When i lift the duct by hand the gap seems to be level.
Now i will calibrate. Hope it works without problems. Thank you very much :):) -
Couple of silly questions from a SpiderBot owner.
(1) If you remove and rotate the effector 120 degrees does the tilt move?
(2) In your arms have you got the magnets polarised ( all the Norths at either the effector or the axis - NB might not be an issue for this effector as the arms don't share the same spheres like the SpiderBot.
(3) You've checked the horizontal plane, are your guides perpendicular (90 degrees to the chosen plane (normally the bed - beware it may move slightly if heated) - Engineers square is useful in this respect.
(4) I see the measurements are written on your arms, just check the inside of them for debris as I suspect they are cupped and small amounts of debris can be picked up from the bearing surface.
(5) I use a squirt of dry PTFE spray on my bearings, if you haven't got any dry spray - summer dry bike chain lube isn't too bad. -
@Bluemalu thank you for your tips but the problem is solved. The problem was the duct. It is only mounted at one side so the not mounted side sagged
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@garyd9 said in Delta effector constant tilt:
I'd love to argue with you about that
I agree that various geometrical things can go wrong that can make the effector have a tile, but I propose that there is no movement along the actuated axis that can cause the tilt to change.
Here's a paper that describes linear delta kinematics and you will notice there is no "Angle of the effector platform" anywhere in the kinematics.
https://reprap.org/mediawiki/images/b/b5/Rostock_Delta_Kinematics_3.pdf
If you have experience where the effector tilt changed when moving axis (when the geometry is correct of course) I'm interested in learning more.
Deltas are sure a fun beast to tame.
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@alankilian said in Delta effector constant tilt:
I agree that various geometrical things can go wrong that can make the effector have a tile, but I propose that there is no movement along the actuated axis that can cause the tilt to change.
Correct. if the geometry is correct, the only thing that can cause the effector to tilt is if the machine as whole is tilting. But a fan duct making contact with the bed would likely cause one of the rods to become slightly disconnected, causing a tilt.
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Now i did the first print after calibrating. (I am using klipper firmware) And it worked very well. Only bad thing is the fan duct. This tusk cooler thing is sooo bad like you have no part cooling. Now i will design my own duct.
Thank you guys
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try this. it should fit
