Saturday, February 17, 2007
Pressing Belt Gears
I've pressed 2 sets of belt gears for Darwin using my acrylic moulds. There are 4 sheets of acrylic with alignment holes (the 4 little bolts go in them). Sheets 1 & 4 have 8mm holes in the middle, sheets 2&3 45mm holes. A piece of belt goes around the hole in sheets 2&3 to put teeth on the edge, exactly as per the rig that Ed made. PVC food wrap stops the CAPA sticking to sheets 1 & 4. The trick is not to press too hard or you open up a gap where your belt joins into a loop.![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinq1i6nONiH1EIobY7Na-hAcsJHArrwDTxFY5jd9pjXfhZifCKlINfkPy_uXrZv57m9zeeWMFKW0MwB9Fi2UIJ8FkY5Lrk-py6_go83-90pvGpsCx4SchuClgsVop-dOEcu5ML40Bh/s320/dsc03003.jpg)
They need a little trimming, but a sturdy pair of scissors does that just fine. Better than a craft knife.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-ovc-vchCci4g4LmduxkH0X5iXfft0Rbog1MgkIcPogr_bUmd5Ak6WfSCR-5y0miCndUhP35MZRmHGC5PK-RICXJYPoml0k1E24NAZfeC7QO-8yueE5fVaOvF-BVCcUMVSdIElj_T/s320/dsc03013.jpg)
Zach is kindly documenting the process here.
Vik :v)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinq1i6nONiH1EIobY7Na-hAcsJHArrwDTxFY5jd9pjXfhZifCKlINfkPy_uXrZv57m9zeeWMFKW0MwB9Fi2UIJ8FkY5Lrk-py6_go83-90pvGpsCx4SchuClgsVop-dOEcu5ML40Bh/s320/dsc03003.jpg)
They need a little trimming, but a sturdy pair of scissors does that just fine. Better than a craft knife.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-ovc-vchCci4g4LmduxkH0X5iXfft0Rbog1MgkIcPogr_bUmd5Ak6WfSCR-5y0miCndUhP35MZRmHGC5PK-RICXJYPoml0k1E24NAZfeC7QO-8yueE5fVaOvF-BVCcUMVSdIElj_T/s320/dsc03013.jpg)
Zach is kindly documenting the process here.
Vik :v)
Labels: capa belt gear polymorph darwin reprap
Comments:
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I got mine from rs (cf mauser?) - timing belts of 2.5mm pitch are pretty easy to get hold of I think.
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