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PostPosted: Sat Aug 31, 2013 12:29 pm 
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For those who are interested, I publish my Z motor holder. It consists of two parts, is stable and self aligning within the alu profile. The end switch has more space and is attached with two srews. The threaded z-rod is now perfectly aligned with the original upper bearing holder.
Image
Image

Download:
Baseplate
Holder (for tapping screws)
Holder (for M3 nuts)


Last edited by edirol on Fri Feb 21, 2014 9:49 am, edited 2 times in total.

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PostPosted: Sat Aug 31, 2013 1:21 pm 
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Location: Germany (PLZ 747xx)
I like this. :)


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PostPosted: Sat Aug 31, 2013 3:36 pm 
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Location: Lint Belgium
Great!!
Thanks, start printing this night ;-)


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PostPosted: Sat Aug 31, 2013 4:39 pm 
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Nice! Can you tell me what screws I will need to assemble this?


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PostPosted: Sat Aug 31, 2013 4:47 pm 
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Great design. Did you tap the 7 screw that connect the two parts? Or do you use self taping screws (? selbstschneidende Schrauben)?

I start printing it (if my Z-Axle need improvement) as soon as i finished the build ;)

Btw. What software did you use to produce this design? I like the smooth curve for the stabilizer.

Greetings
Matthias


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PostPosted: Sat Aug 31, 2013 5:19 pm 
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Screws:
To assemble the two parts: wood countersunk bolts (Spanplatten Senkschrauben) 3x16 (6x), 3x12 (1x)
Schwitch: could probably be the same, I took tapping screws (Blechschrauben) 2.9x13 (2x)
So no thread tapping required. Of course you can tapp the thread and use M3.

Motor: M3x10 (4x) + spring washer (Federscheibe)
To frame: M5 (4x)

Designed in Solidworks.

Please, I want to see your assembly! ok?


Last edited by edirol on Mon Sep 02, 2013 12:57 pm, edited 1 time in total.

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PostPosted: Sun Sep 01, 2013 10:05 am 
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looks nice


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PostPosted: Mon Sep 02, 2013 6:25 am 
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Thank you edirol, this looks really good!
I finished my printer yesterday and did some first test prints which were quite successful. My only 2 issues right now are the wobbling z motor and sometimes insufficient PLA flow. So I'm working on fixing these problems now and guess your parts could solve the z motor problem quite nicely :-).


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PostPosted: Mon Sep 02, 2013 6:49 am 
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Location: Lint Belgium
skyreacher wrote:
Thank you edirol, this looks really good!
I finished my printer yesterday and did some first test prints which were quite successful. My only 2 issues right now are the wobbling z motor and sometimes insufficient PLA flow. So I'm working on fixing these problems now and guess your parts could solve the z motor problem quite nicely :-).


I printed the parts, all fine ;-)


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PostPosted: Mon Sep 02, 2013 11:02 am 
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skyreacher wrote:
Thank you edirol, this looks really good!
I finished my printer yesterday and did some first test prints which were quite successful. My only 2 issues right now are the wobbling z motor and sometimes insufficient PLA flow. So I'm working on fixing these problems now and guess your parts could solve the z motor problem quite nicely :-).

Youre wellcome

My suggestion, even if this motor holder is quite stable, i recommend you to line up the bent rod as good as possible because when the motor is stable anchored, it will else emit forces to the whole construction.


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PostPosted: Mon Sep 02, 2013 11:20 am 
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A combination of this improved Z-motor holder with the replacement of the threaded spindle described here by motoritz http://forum.velleman.be/viewtopic.php?f=53&t=9355 seems to be quite interesting.

By the way: Wouldn't it improve things further to have the Z-motor on top and the threaded spindle (or the trapezoidal spindle used by motoritz) with a decent fixed spindle holder sitting at it's bottom?

Thus the motor's bearings wouldn't have to carry the spindle's and the whole Z traverse assembly's weight, and given a reasonably precise "decent fixed spindle holder" the wobble thingy should be decreased futher.


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PostPosted: Mon Sep 02, 2013 2:58 pm 
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I didn't have time to disassemble and investigate on the topic yet, but before building the z axis I checked the rod because I already read that it is often bent. Mine was actually quite straight. What seemed to be much worse was this connection part between motor and rod, which is not straight at all. But I guess I can't fix this part easily... or is it some kind of standard part that can be purchased somewhere?


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PostPosted: Mon Sep 02, 2013 6:27 pm 
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skyreacher wrote:
What seemed to be much worse was this connection part between motor and rod, which is not straight at all. But I guess I can't fix this part easily... or is it some kind of standard part that can be purchased somewhere?


This part is easy to make for a mechanic. You probably know one?
I also build my self with a slightly different design to remove the wobbling forces as you can see in the picture above.


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PostPosted: Mon Sep 02, 2013 9:06 pm 
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clm wrote:
By the way: Wouldn't it improve things further to have the Z-motor on top and the threaded spindle (or the trapezoidal spindle used by motoritz) with a decent fixed spindle holder sitting at it's bottom?

Thus the motor's bearings wouldn't have to carry the spindle's and the whole Z traverse assembly's weight, and given a reasonably precise "decent fixed spindle holder" the wobble thingy should be decreased futher.


I don't think that make much sense. You can also let a more stable designed upper bearing holder let carry the weight. You just swap the problem upside down, since the hole frame is more stable at the buttom. And the bearings of the motor should be able to carry the z support with ease, thats not what I worry about.


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PostPosted: Thu Sep 12, 2013 7:05 pm 
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@ edirol
Really great holder for the z-stepper. Thanks for sharing!!
Question: What is your recommendation? Printing the infill solid or only some percentage (how much) of infill?

After replacing only the original coupler with the flexible coupler the quality increased very much.
I hope the more stable z-stepper holder could also help to improve further. :-)


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