GT2 Belt tensioner

A DIY GT2 belt tensioner
salvaged a Guitar Tuning Knob/Machine


Edited 1 time(s). Last edit at 09/22/2016 05:31PM by makerparts.

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

So how does this work?
I know how it works with wire, but for a belt?

I will post a design soon.

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

here is a revised version.
bit bulky but it works well.

belttensionerv1.stl

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

It's not very obvious how that mechanism would work, can you explain it for us please?

It looks like it would hold one end of a non-continuous belt, allowing you to adjust tension with the tuner knob. Imagine mounting it on the X carriage instead of the usual belt clamp.

The belt makes one full turn around the pulley, thus locking it down. Guitar string tuners use worm gears to tension the strings- you can change the tension with the knob but the tension pulling in the gear can't make it loosen. OTOH, guitars have to be retuned frequently...

I'm not generally concerned about weight or bulk, but this thing seems unnecessarily bulky and heavy for such a simple function.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

Video about it

[www.youtube.com]

[www.thingiverse.com]

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

Quote
the_digital_dentist
this thing seems unnecessarily bulky and heavy for such a simple function.

Can you show a smaller mechanism that works in a similar fashion.. easy to adjust (without undooing screws/nuts/zipties

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

How about mounting the motor mount or the idler pulley in slots that allow it to be pulled tight then screwed down? You only have to adjust belt tension very rarely. Guitar tuners are designed for something that has to be adjusted frequently and with a lot more tension than a GT2 belt.

Here's a motor mount I am using in a CoreXY mechanism. The mount is made from a piece of square aluminum tubing, screwed to the base plate which has slots. When I am adjusting the belt tension I loosen the screws, pull on the mount, then tighten it down. I won't have to adjust it again for a long time.



Belt clamp for extruder carriage used on my current printer: [www.youmagine.com]

Belt clamp for coreXY:



Belt tensioner for current printer, soon to be replaced with a much simpler, aluminum part:

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

looks very good