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mail@bvff.dk
Posts: 8
I want to improve my makibox, I want to add a driveshaft on the loose end on the x and y axis to remove wobble.
I have not found the specificatin on the trapizodal drive shafts, Can someone write them so that I can obtain them from a local place
2021-06-25 04:29
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NarimaanV
Posts: 348
The only specifications I know of these lead screws are that they're 8mm in diameter and travel 8mm per revolution (aka the lead), which is ALMOST everything you need to know, the only other thing being the number of starts, which I'm pretty sure people have mentioned in the forums before, but I can't recall off the top of my head.

***EDIT*** Actually I just found a post (http://www.makibox.com/forum/message/19117) saying the screw's got 4 starts, so theoretically you'd need a screw that's 8mm wide, has 4 starts, and a 8mm lead (that's only about 90% accurate, so don't hold me responsible if some part of that is inaccurate :P

And actually something like this might work http://openbuildspartstore.com/8mm-metric-lead-screw-acme/
Given Up on Waiting, Don't Care if it Comes Anymore :thumbdown:
2021-06-25 08:39
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PaulB
Posts: 223
My guess is that adding drive shafts will create a range of new problems. They need steppers to drive them, and that introduces a load of potential problems. The additional inertia may slow acceleration and deceleration also.

I was wondering if it would be possible to do something similar using pulleys, so that as one end of the axis is driven by the lead screw, it's movement is transmitted to the other end. I'm imaging fishing line that feeds back to the home position, down to the base of the makibox, diagonally across the base, back up, and then to the rods. Repeat x4. Pulleys at every corner.
2021-06-25 10:22
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robthebrew
Posts: 763
I replaced the plastic couplers and straightened the bent Y rod. I now have no wobble on any axis. See my post elsewhere.
2021-06-25 12:19
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mail@bvff.dk
Posts: 8
Sorry I am new to this forum and dont know how to get around, where do I find the post robthebrew is talking about?

I am not able to find a trapezodal rod 8mm with 8mm pitch, even a dual thread only has 4mm pitch, not even when googeling for it, are they costum made with 4 threads? If anybody knew the standard, like DINxxx, I could just google that and easily find them.

I think about connecting them together with pulleys. if needed i will add 2 steppers and drivers
2021-06-25 15:48
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Citizen_Snips
Posts: 88
Here is the post he is referring to. He changed out the stock plastic couplers with aluminum ones.
http://makibox.com/forum/topic/2827
2021-06-26 10:29
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robthebrew
Posts: 763
It isn't 8mm pitch, it is 8mm Lead.
2021-06-26 12:38
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mail@bvff.dk
Posts: 8
My wobble is not between the motors and drive rods, but from the 2 rods that guides the printer head. the rods are too lose in the plastic parts and moves a bit from side to side.

Maybe I also have a problem with the couplers. I will see that later
2021-06-26 16:41
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bitpharked
Posts: 38
iconmail@bvff.dk:
My wobble is not between the motors and drive rods, but from the 2 rods that guides the printer head. the rods are too lose in the plastic parts and moves a bit from side to side.

Maybe I also have a problem with the couplers. I will see that later


There are you tube videos on how to calibrate this wobble if it helps!
https://www.youtube.com/watch?v=jJXu9ff4onQ
2021-06-26 20:32
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Kristian Blåsol (Sourcery)
From: Vittsjoe, Sweden
Posts: 209
The youtube videos are really good, that is the good thing about a kit with the same build for all printers. It makes tuning and assembly much easier to explain :)

Even though I thought that these videos were a bit fuzzy at the start, after just listening and reading on this forum I understand what he means, and how to do it :) And I dont even have a printer yet ;)
Makibox HT ordered,
Sourcery Studios - Boundless Creativity
http://www.sourcerystudios.se
2021-06-27 13:56
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