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Low Profile Adjustable Belt Tightener

by owen, published

Low Profile Adjustable Belt Tightener by owen Jun 5, 2012

Description

Adjustable belt tension with a screw. Low profile, suitable for Ultimaker etc.

Recent Comments

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I think it is a conspiracy. Your belt tensioners made too much sense, so revisions had to be made! Note it renders your other belt tensioners useless for the Y as well.
&
amp;gt;:o

I was able to install chasmaker's tighteners. I think the stock so called "tightener" really needs an overhaul - it was practically useless for me.
Yeah, I see the change.

Thanks for the update. *DONT_KNOW*
I see the difference now, they added a notch on the top left, here is a pic of mine.

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Instructions


Update: These won't fit on the 'Y' belts on newer UM's.
See Notes and Picture in the comments below.
Main picture here shows a clamp on the 'Y' belt of an older UM.

Parts required per belt

4 - M2.5 X 8mm small head screws. - ebay.com.au/itm/300521403792?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
1 - M2.5 X 30+mm screw. (35mm used here) - ebay.com.au/itm/370568422906?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
5 - M2.5 thin nuts - ebay.com.au/itm/120894813183?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649


Instructions

* Print 2 X Nut Side and 2 X Screw Side clamps for each belt (in there current orientation) and clean out with a 2.5 mm drill.
* Work out where the outside pair will clamp to the belt and move the spot to the centre.
* Twist the belt to assist in putting the clamp on.
* Push through the adjusting screw all the way through the bottom clamp.
* Place the other bottom clamp on the adjusting screw.
* Put the nut on the adjusting screw a few turns and slide the free clamp up against it.
* Clamp the top clamp onto the bottom clamp.
* Tighten the adjusting screw and twist the clamps so they are horizontal.
* Test tightness and adjust.


Hint

Over tightening makes it harder to move the extruder so test it still moves freely after tightening.
Hmmm, this doesn't seem to fit in my Ultimaker on my Y. I wonder if they make the clearance less now?
owen - in reply to 3DTOPO
What's your measurement 3DTOPO of your gap there and I'll measure mine tommorrow and let you know if you like. :)
3DTOPO - in reply to owen
Thanks Owen! Mine is 9.38mm at best. The belt itself is only 2mm above the Y crraige block.
I see the difference now, they added a notch on the top left, here is a pic of mine.
owen - in reply to 3DTOPO
Yeah, I see the change.

Thanks for the update. *DONT_KNOW*
3DTOPO - in reply to owen
I think it is a conspiracy. Your belt tensioners made too much sense, so revisions had to be made! Note it renders your other belt tensioners useless for the Y as well.
&
amp;gt;:o

I was able to install chasmaker's tighteners. I think the stock so called "tightener" really needs an overhaul - it was practically useless for me.
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