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Pimousse
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VESC CNC case - Feedbacks

Hi !

I open this thread to put few inputs about the CNC case.

1. The edges of the input power hole are sharp. With vibration I'm afraid that the silicone of wires will be cut making a short at the end (there is already a mark on mine)
http://hpics.li/2e73bd2
Is it possible to smooth the edge with a fillet or chamfer ?
For the moment I would suggest betas to add a little piece a heatshrink to protect the silicone. ;)

BTW, congrats for this great case, it feels like rock solid !

frank
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We have a rubber mould in the make, so that all cable outs are sealed and nothing can touch the alloy. Its one big 3D shaped piece. Thx for the feedback! Frank
sl33py
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Thanks for the pic - i'll plan on using a file to lightly round the edge.

frank
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You better just use shrink tube. If you want to file, you need to take the VESC apart, which could damage the heat pad! It's an expensive 6W/mK, insulating pad. Damaging it might short circuit your FETS. Frank
Brad
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I just received my two vesc's today. Very nice workmanship!

The leads also has marks from the edge of the casing as well.

Are you going to ship out the rubber casing to us or do we need to buy it? Will make do with shrink wrap for now.

frank
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First it needs to be made.... It should be easy to upgrade the BETA VESCs. Frank
Brad
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Yes I know it has to be made. Was requesting information about once it was made.....

sl33py
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I recall that they would be sent when made - to all the BETA users as it should give us some weatherproofing.

I'll let Frank/Ben/etc confirm though.

frank
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The issue is that you need to take the VESC apart to do the Job. Some users might be able to do that without damaging the VESC, others will struggle. Depending on how you mount/house your VESC, you may find that it's not necessary to upgrade and take the risk. Personally I think the electronic components should sit in a good enclosure anyway. We need to make them and test them first. Frank
benjamin
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Taking the VESC apart and putting it together is fairly easy, the only problem, as I confirmed today, is that the heat pad under the MOSFETs gets damaged easily in the process. Maybe a new heatpad is required as well when adding the rubber seal.

frank
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True
Dude
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Just in case, is there a special heatpad you recommend? What should be the thickness and the thermal conductivity?
Thanks, Dude

frank
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The heat pad is a 6W/mk - 0.5 or 1mm should do the job. It needs to be insulating! Frank
solidgeek
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I remember Frank telling that the silicon/rubber sealing would be sent to us free of charge :-) At least I think I paid for it, as it is included in the product description (even the beta-description). Maybe I misunderstod something :-P

hexakopter
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Jup, I remember that, too. I think that statement he told us in the past cant be misunderstood.
Also from Benjamins first post in the VESC 6 BETA thread:
"For now the VESCs will be shipped without a rubber seal for the cables and cover since the mold for it takes more time, but once it is ready we will ship it to you."

Necromenz
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Pimousse
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Nice work ! Thanks Necromenz
Which rubbet did you use ? Do you have a link for ?

I have another input for the case :

2. It's impossible to screw the VESC from the top because of top PCB holes which are too small to let the M5 screw going through.
If I screw from the bottom, the screw is stucked when arriving to the PCB : http://hpics.li/634833a
From the top, naturally, no way to put the screw : http://hpics.li/1be273a

BTW, how to display directly pictures in the thread ? PHPbb and HTML codes seem to not being allowed.

frank
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You can screw from the Top! Just use M4. That is why we used M5, so you have both options. Frank
Pimousse
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Ok, got it !
That's smart.
As I mentioned on eskate.builders forum, a drawing explaining this trick could be useful in the manual. ;)

Necromenz
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I use this one
https://www.amazon.de/gp/product/B01M0QOSK8/ref=oh_aui_detailpage_o03_s0...
i have test it with my heat gun and 15sec under full power befor the belt start to melt. i hope the vesc never became so hot :)