| Gallery, Projects and General > How do I?? |
| Slippy clutch material? |
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| awemawson:
I'd try a bit of Paxolin or Carp - srbp (synthetic resin bonded paper) and see how it performs |
| Manxmodder:
Ade,you say it looks to be some type of fibre material,if it is a brown colour it may be Tufnol which is fibres bonded with resin and pressed and baked to make a solid material. I think it is still available......OZ. Edit to add: Andrew,your post came in while I was typing. Isn't Paxolin similar stuff to Tufnol? |
| polecat:
yes paxolin and tufnol as well as holoplast all the same stuff polecat |
| AdeV:
Thanks for all the replies chaps - it does look a bit like old resin circuit board, so that's a great idea to start with, ta :) I'm not sure how much force is transmitted; the drive plate is a relatively smooth steel item, the clutch is then pressed against this by quite a powerful spring. It has to hold the weight of the electrode & supporting column, which isn't exactly light, probably 20lbs at a guess, and to lift it back out of the work piece via the motor. On the other hand, it has to be slippy enough that I can grab the fairly small manual handle, to wind the electrode + column back up. If I get a chance at the weekend, I'll take some pictures so you can see what I'm talking about... There is another option - do away with the clutch entirely, clamp the two parts together, then add a 3-way 4-pole switch to reverse the current going into the motor; instead of winding the electrode out of the workpiece, use the motor instead.... The centre position is needed so the motor doesn't try to wind the electrode out of the top of the unit - as it doesn't have any limit switch on upward travel... This would be the quickest option to get the machine up & running again, except for the fact I'm not sure what the current draw on the motor is, and the voltage is over 100vdc which rules out any switches I've got... |
| Bluechip:
Tufnol & Paxolin are/were manufacturers. Tufnol make both SRBP & SRBF. http://www.tufnol.com/materials-full/paper-laminates-full.aspx http://www.tufnol.com/materials-full/fabric_laminates.aspx Dave |
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