Drive belt Questions ?

I received the drive belt from the RRRF; I though it was odd as all the pictures show white belt this belt is black. So before making the gears using CAPA, as described by Joost van de Wiel in his post July 03, 2007 06:47AM.

I did a few calculations based on the XML Belt that seems to have 2.032 pitch not 2.5mm pitch thus:-

50-(0.64 * 2) * 3.14159265/ 2.032 = 75.32 (75) teeth.

14-(0.64 * 2) * 3.14159265 / 2.032 = 19.65 (20) teeth.

The original post by Joost did not indicate which belt was used.

Questions

Has any one else used the RRRF belt?
What was the diameter / number of teeth for each gear used?
If as above how can the difference of 0.468 mm per tooth be compensated for?
Was the belt originaly 2.032mm pitch with a recent design change to 2.5mm pitch?

Many thanks

Edited 1 time(s). Last edit at 01/03/2009 10:53AM by BodgeIt.

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Bodge It [reprap.org]
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OOPs excuse the questions the number of teeth is not significant.

Calculations based on 2.5mm pitch
NB the 0.64mm is the depth of belt before the teeth.

50-(0.64 * 2) * 3.14159265/ 2.032 = 61.22 (61) teeth.

14-(0.64 * 2) * 3.14159265 / 2.032 = 15.98 (16) teeth.

Thus one turn is 16 * 2.5mm 40mm the same as 20 teeth at 40mm / 2.032

Back to making CAPA / Polymorph moulds doh...

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Bodge It [reprap.org]
=======================================

---

BIQ Sanguinololu SD LCD board	BIQ Stepcon	BIQ Opto Endstop
BIQ Heater Block PCB	BIQ Extruder Peek clamp replacement	BIQ Huxley Seedling
BIQ Sanguinololu mounting	BIQ standalone Sanguinololu or Ramps mounting	Print It Stick It Cut it

My rep strap: [repstrapbertha.blogspot.com]

Buy the bits from B&Q pipestrap [diyrepstrap.blogspot.com]
How to Build a Darwin without any Rep Rap Parts [repstrapdarwin.blogspot.com]
Web Site [www.takeaway3dtech.com]