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replace Sophia's carriage drive belt #565

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DefProc opened this Issue Sep 5, 2017 · 14 comments

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DefProc commented Sep 5, 2017

The carriage drive belt (the y-axis belt, under the arm that moves the laser lens and final mirror) needs replacing, as it is failing, and is only being held together by the kevlar cords at two points(!). While it is currently still functional, it could fail in use at any time.

@DoESsean has emailed HPC to get some replacement belt sent through (and they still owe us for the belt for Gerald that we paid for and the couldn't supply), so hopefully we'll get a replacement through shortly.

sophia-belt

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DoESsean Sep 21, 2017

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@jackie1050 reports that there are still a lot of slippages with Sophia, and it needs some serious cleaning.

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DoESsean commented Sep 21, 2017

@jackie1050 reports that there are still a lot of slippages with Sophia, and it needs some serious cleaning.

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DefProc Oct 4, 2017

As far as I'm aware, we haven't had a reply from HPC yet (@DoESsean?). If that's the case, then we still need to chase them for a new belt, and we could also ask for some wheels for sophia (#198) which might help with ghosting.

DefProc commented Oct 4, 2017

As far as I'm aware, we haven't had a reply from HPC yet (@DoESsean?). If that's the case, then we still need to chase them for a new belt, and we could also ask for some wheels for sophia (#198) which might help with ghosting.

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DoESsean commented Oct 10, 2017

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DoESsean Oct 19, 2017

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We need a laser carriage belt: LS3040

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DoESsean commented Oct 19, 2017

We need a laser carriage belt: LS3040

@DefProc DefProc referenced this issue Nov 20, 2017

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do a major service on sophia #605

4 of 8 tasks complete
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jackie1050 Jan 20, 2018

Darren has tried to order from 2 companies, but neither have been able to provide them.
The part numbers are MXL362 and MXL037
He has now put an enquiry in from a 3rd company
(I'll try to get the company names and record them here)

jackie1050 commented Jan 20, 2018

Darren has tried to order from 2 companies, but neither have been able to provide them.
The part numbers are MXL362 and MXL037
He has now put an enquiry in from a 3rd company
(I'll try to get the company names and record them here)

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amcewen Feb 10, 2018

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Darren has got two shorter belts now (as that's all he's been able to source from the companies he's been talking to) so we'd need to cut and join them to use those. As that's the case, I've just ordered a metre of 6.35mm MXL belting from the people we used for the last belt for Sophia, as that'll only need one join.

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amcewen commented Feb 10, 2018

Darren has got two shorter belts now (as that's all he's been able to source from the companies he's been talking to) so we'd need to cut and join them to use those. As that's the case, I've just ordered a metre of 6.35mm MXL belting from the people we used for the last belt for Sophia, as that'll only need one join.

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amcewen Apr 3, 2018

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Has this been fixed now @johncain39, @dazz-ling?

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amcewen commented Apr 3, 2018

Has this been fixed now @johncain39, @dazz-ling?

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johncain39 Apr 3, 2018

Yes, myself and Darran did this and the wheels about 3/4 weeks ago.

johncain39 commented Apr 3, 2018

Yes, myself and Darran did this and the wheels about 3/4 weeks ago.

@Dowz77 Dowz77 closed this May 15, 2018

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amcewen May 24, 2018

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The movement along that axis has been really stiff still, and @magman2112 noticed the belt is riding up and down the idler wheel (the one at the front-end of the cutter), suggesting the belt we bought might not be wide enough. Reopening this so he can work out what size would work better so we can get another belt.

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amcewen commented May 24, 2018

The movement along that axis has been really stiff still, and @magman2112 noticed the belt is riding up and down the idler wheel (the one at the front-end of the cutter), suggesting the belt we bought might not be wide enough. Reopening this so he can work out what size would work better so we can get another belt.

@amcewen amcewen reopened this May 24, 2018

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magman2112 May 24, 2018

It is actually that the belt is too wide for the idler wheel 6.3mm compared to 5.6mm. This causes the belt to ride up on the idler, jamming on one of the edges of the idler carrier bracket. I played around with the belt tension for a while but couldn’t get it to behave.

I will have a look for another idler wheel or belt that matches either one or the other measurement.

magman2112 commented May 24, 2018

It is actually that the belt is too wide for the idler wheel 6.3mm compared to 5.6mm. This causes the belt to ride up on the idler, jamming on one of the edges of the idler carrier bracket. I played around with the belt tension for a while but couldn’t get it to behave.

I will have a look for another idler wheel or belt that matches either one or the other measurement.

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That makes more sense - I did wonder if the new belt would be too wide, but went with one of the standard sizes from beltingonline.com as it was hard to measure the correct size of the old belt. They will do custom widths if we want to order something different...

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amcewen commented May 24, 2018

That makes more sense - I did wonder if the new belt would be too wide, but went with one of the standard sizes from beltingonline.com as it was hard to measure the correct size of the old belt. They will do custom widths if we want to order something different...

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johncain39 May 25, 2018

johncain39 commented May 25, 2018

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magman2112 May 25, 2018

I’ve been doing a bit of digging on the drive belt front and found a design on Thingiverse that may allow us to print our own idler wheel that fits the belt we have, though the design may need a bit of tweaking to fit.

https://www.thingiverse.com/thing:2395830

magman2112 commented May 25, 2018

I’ve been doing a bit of digging on the drive belt front and found a design on Thingiverse that may allow us to print our own idler wheel that fits the belt we have, though the design may need a bit of tweaking to fit.

https://www.thingiverse.com/thing:2395830

@amcewen amcewen added the Broken label Jul 2, 2018

N-Sinnott added a commit to DoESLiverpool/somewhere-safe that referenced this issue Jul 6, 2018

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N-Sinnott Jul 6, 2018

After Mike took measurements for the old idler wheel, we adjusted them for the new belt, before Julian and I modeled the new design in OnShape. We printed, then replaced the old wheel in Sophia with the 3D printed wheel. To my knowledge, Mike and Adrian adjusted other things in Sophia, and she is now fixed. Here is the somewhere safe link for the wheel, in STEP and SLT.

N-Sinnott commented Jul 6, 2018

After Mike took measurements for the old idler wheel, we adjusted them for the new belt, before Julian and I modeled the new design in OnShape. We printed, then replaced the old wheel in Sophia with the 3D printed wheel. To my knowledge, Mike and Adrian adjusted other things in Sophia, and she is now fixed. Here is the somewhere safe link for the wheel, in STEP and SLT.

@N-Sinnott N-Sinnott closed this Jul 6, 2018

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