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Y axis belt tensioner.

Posted by Margomael 
Y axis belt tensioner.
October 03, 2012 04:14AM
Hello everyone,

I have a question regardong Y axis tensioner. I have the reprap pro huxley model, not the emar one.

Can anyone tell me the function of the locking nut on the center of the rectangular plate? Goes inside a little recess. Please see picture.

Thanks
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open | download - 300px-Reprappro-huxley-section-1-assembled-b.jpg (9.7 KB)
Re: Y axis belt tensioner.
October 03, 2012 07:00AM
I'd say you put a bolt through it, which would push on the belt to accurately change the tension.

But then I know nothing about reprap pro huxley, just a wild guess.


Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.
Re: Y axis belt tensioner.
October 03, 2012 07:52AM
Thanks that is also my guess but maybe the screw will damage the back of the belt. Also the nut is loose in a recess so if I try to fit a screw will lift from the recees and get out of place.

Another possible issue is that this part is quite close to a threaded bar so if a bolt is there, the head of the screw will probably clash into the bar.

Thanks
Re: Y axis belt tensioner.
October 03, 2012 09:03AM
Thinking about it if I use a grub screw then it will clear the threaded bar underneath.
Re: Y axis belt tensioner.
October 03, 2012 09:44AM
That's it, the wiki says "You should have some M3 grub screws in the kit which are left over from when we used the older style of pulley. One of these can now be used in the belt tensioner."


Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.
Re: Y axis belt tensioner.
October 03, 2012 09:46AM
Margomael Wrote:
-------------------------------------------------------
> Thanks that is also my guess but maybe the screw
> will damage the back of the belt. Also the nut is
> loose in a recess so if I try to fit a screw will
> lift from the recees and get out of place.

It will only lift until you push on the belt, once tensioned pressure would make it back down, wouldn't it ?


Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.
Re: Y axis belt tensioner.
October 03, 2012 10:00AM
Thanks DeuxVis, I missed that line on wiki.

I need to tension a bit more the belt manually so when I lace the grub scrw the nut will not lift as much.

Also the grub screw will not rub on the belt as both move together at same speed.

Thanks again
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