# TAZ 4 (5 upgraded) belt tensioning springs?
**URL:** https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741
**Category:** Hardware
**Created:** [January 6, 2016, 9:44pm UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741 "2016-01-06T21:44:56Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@tmorris9](https://forum.lulzbot.com/u/tmorris9)
#### Post date: [January 6, 2016, 9:44pm UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741/1 "2016-01-06T21:44:56Z")
I am about to do some upgrades to my TAZ 4 (with TAZ 5 hotend and PEI) and I am wondering about using belt tensioning torsion springs. Seems like a good idea but I know in practice that is not always the case.
So, has anybody used them on a TAZ? Or is it just a bad idea?
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### Author:  [@mirage335](https://forum.lulzbot.com/u/mirage335)
#### Post date: [January 6, 2016, 9:56pm UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741/2 "2016-01-06T21:56:28Z")
Planning to try them myself. However, three zip ties have always worked well to achieve extremely tight belt tension.
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### Author:  [@piercet](https://forum.lulzbot.com/u/piercet)
#### Post date: [January 6, 2016, 10:02pm UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741/3 "2016-01-06T22:02:51Z")
To tension the Y axis, loosen the Y axis idler mount bolts, tighten the belt, then tighten the bolts. To tension the X axis belt, print my retrofit belt tensioner and attach it to the x carriage, or upgrade to the X openrails with integrated tensioner.
The springs work ok too. Until they fall off.
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### Author:  [@tmorris9](https://forum.lulzbot.com/u/tmorris9)
#### Post date: [January 7, 2016, 1:12am UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741/4 "2016-01-07T01:12:28Z")
> The springs work ok too. Until they fall off.
The ones I saw had an extra bit that goes over the other side of the belt to keep them in place (not like the clothes pin variety). I also saw your add on that I might look at harder if you think it’s a better solution.
I am going to be putting all new sleeve (PTFE) bearings that I have been testing out as well as tightening all bolts (and figuring out where one goes that ended up on the desk below the printer) and just giving it a general once over to assure everything is in good working order.
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### Author:  [@tmorris9](https://forum.lulzbot.com/u/tmorris9)
#### Post date: [January 7, 2016, 1:13am UTC](https://forum.lulzbot.com/t/taz-4-5-upgraded-belt-tensioning-springs/2741/5 "2016-01-07T01:13:15Z")
forgot the photo.