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jomettler / Trident-Experimental

Repository for Mods by me for the Voron Trident 3D Printer
GNU General Public License v3.0
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Joints dont line up. #1

Closed eraldylli closed 1 year ago

eraldylli commented 2 years ago

When trying to derack the gantry, the joints don't line up as they should, when the gantry is pulled all the way forward. Other than that, which I worked around, this github equiped me with all I needed for my fully MGN12H Trident. Thanks!

jomettler commented 2 years ago

Hi, please excuse the late reply. I´m glad it worked for you in the end, but what do you mean with "the joints don´t line up as they should"? I remeasured the joints both on my trident and in CAD and they seem fine. Am I missing something? Thank you very much for your feedback!

Best,

eraldylli commented 1 year ago

Hi, I cant take pictures right now, but I will try to explain what I mean. When trying to derack the gantry, If both xy joints touch the motor mounts, the x rail shifts at an angle of 7-10 degrees. If the x rail is perfectly perpendicular to the xy joints, the left one is ahead by an inch or so. Do I make myself understood? I'm having trouble explaining it better than this.

eraldylli commented 1 year ago

Btw, I really appreciate your work, hence the reporting of this issue (which can be happening to me alone).

jomettler commented 1 year ago

Ok, I think I get what you mean. I still can not reproduce it either in CAD or my machine. Is your frame and rail alignment square? With CoreXY (and my impression is its worse on QuadAB) its also possible you pull it out of square by increasing belt tension. I used zip ties to keep my X axis all the way in the back and not accidentally rack it. Also, motors must be powered off and ideally be unplugged.

CAD pictures to clarify what I understand is your problem: Either they would be at an angle at the same position, or the distance to the AB mounts would be unequal at same X position. Both not the case. image image image

Always happy about issues and feedback, thank you!

eraldylli commented 1 year ago

Thanks for the screenshots. Makes it far more simple, and yes you understood exactly what I meant. Im not sure If im using an old version (downloaded 4 months ago) or there is a discrepancy in the way the CAD shows it, but I couldnt reproduce this. Managed to take some (blurry) photos to show what the problem could come from. This is the joints seen from below. Notice that the rail carriage on the left joint (2nd picture) sticks out about 8-10mm more than the left carriage (1st picture). Maybe the joints are not supposed to be identical... But if they are supposed to be identical, this might indicate towards the reason they are not. What do you think?

20221128_170033

20221128_170050

eraldylli commented 1 year ago

Btw the endstop pod thingy I have modified myself, because I needed one for mgn12 carriages and I couldnt find any online.

jomettler commented 1 year ago

AH, THANK YOU! Now I see, this is indeed an error in design, will fix!

jomettler commented 1 year ago

Fixed with 2ce88e33a6c15cfb72dc684c81c14851864f44c6