LowEnergyParticle
Cast Iron
- Joined
- Jul 26, 2004
- Location
- Beaumont, near Houston
I recently bought used on ebay a Diprofil machine, powered by a Gesswein motor and flex shaft. I cleaned and regreased it, mounted a die file in the holder, and ran the motor at a relatively slow setting, about 200 strokes per minute. The tool vibrated so hard in my hand that I had to turn it off after about 30 seconds, and the file was moving around so much that it would be impossible to do any sort of die work with it. Not just moving back and forth, like it's supposed to, but lateral motion all over the place. Kind of hard to describe.
I ran the speed of the motor up and down a bit to confirm that I wasn't just hitting an unlucky resonance, but speed changes had no real effect on the vibration. I then ran the motor and flex shaft with a Foredom #30 handpiece attached (known to be good) and the system worked very well.
Nothing is loose, and all the bearings feel good. The spring load in the tool holder shaft is in good shape, and compresses under hand pressure.
The dial on the eccentric inside the tool body is set on "3".
A couple of questions, if that's OK?
1) The dial on the eccentric has two symmetric scales, both numbered from 1 to 6. What is there a difference between the two scales?
2) The felt lubricating wick at the tip of the tool holder was in very rough shape, and I replaced it with a wrap of 1/8" felt cut to fit. That felt is just for lubrication, right? It's not supposed to be a bearing, is it?
3) Does anyone know what goes wrong on these little gems?
Thank you very much for the help!
Dave
I ran the speed of the motor up and down a bit to confirm that I wasn't just hitting an unlucky resonance, but speed changes had no real effect on the vibration. I then ran the motor and flex shaft with a Foredom #30 handpiece attached (known to be good) and the system worked very well.
Nothing is loose, and all the bearings feel good. The spring load in the tool holder shaft is in good shape, and compresses under hand pressure.
The dial on the eccentric inside the tool body is set on "3".
A couple of questions, if that's OK?
1) The dial on the eccentric has two symmetric scales, both numbered from 1 to 6. What is there a difference between the two scales?
2) The felt lubricating wick at the tip of the tool holder was in very rough shape, and I replaced it with a wrap of 1/8" felt cut to fit. That felt is just for lubrication, right? It's not supposed to be a bearing, is it?
3) Does anyone know what goes wrong on these little gems?
Thank you very much for the help!
Dave