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Belts???

Posted by jimmyjim 
Belts???
February 24, 2017 12:03PM
I need to change my belts!

I bought some MXL belting off Ebay, but the pitch is 2.5mm not 2mm.

Any advice on belts??

Thank you

Jim
Re: Belts???
February 25, 2017 10:03AM
You need GT2 Belts I believe
Re: Belts???
February 25, 2017 12:04PM
Belts and pulleys supplied with original RepRapPro kits (and I guess emaker ones) were MXL, which is an imperial size with a tooth pitch of 0.080", or 2.032mm. They are 1/4" wide, or 6.35mm. Belts for the Fisher were 2.7m long. See: [reprappro.com]
If your belt has a pitch of 2.5mm, it's probably metric T2.5 belt. Don't use GT2 belt with the MXL pulleys, it will throw out the steps per mm. Either get proper MXL belt, or replace pulleys and belt with GT2 versions.

Ian
Re: Belts???
February 25, 2017 12:15PM
Thank you,
I now realise my post was unclear!

My original belt is 2mm pitch, the one off ebay was 2.5 pitch.

I've yet to check how many teeth my pulleys are, (says 18 in the instructions).
Re: Belts???
February 25, 2017 01:11PM
GT2 2mm belt has a 2mm tooth pitch, but has a rounded tooth profile. MXL is very close to 2mm, at 2.032mm, but has a trapezoidal tooth profile. You shouldn't use the GT2 belt with the MXL pulley, and vice versa; you'll get backlash. If you got your Fisher from RepRapPro, get MXL belt. Get the ebay supplier to send you the right belt!

Ian
Re: Belts???
February 25, 2017 10:04PM
I've ordered from another supplier.

If I get no joy this time, I'll switch to GT2 belts and pulleys.

Thank you

Jim
Re: Belts???
February 26, 2017 01:01PM
If you want to go for GT2 then I can recommend ooznest.co.uk. If you do do that then don't forget to change your steps/mm in your configuration to 80 (if I remember correctly).

Edited 1 time(s). Last edit at 02/26/2017 01:03PM by bluesign2k.
Re: Belts???
February 26, 2017 08:54PM
Thank you for the advice.
Re: Belts???
March 13, 2017 11:54AM
My new belts have arrived!!
All layer shifting problems have gone away!
Ebay link for belts
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