| Gallery, Projects and General > Project Logs |
| Building a milling machine |
| << < (28/44) > >> |
| PekkaNF:
That is the same part? I must say that the first one was artistically whole more interesting. Later one is whole lot more functional though. Tough call? :lol: You are making a steady progress. Pekka |
| NormanV:
Earlier this week I cast an aluminium box to house the switchgear and mounted it on the side of the head. today I more or less completed the wiring, the last task is to replace the temporary plywood switch mounting panel when I can find some sheet aluminium. I can now raise and lower the knee under power or manually, and I have had the spindle running also. I had problems initially with the pulley alignment causing the belt to run out of line but that was easy to correct. The last remaining problem is the tachometer, it shows random speeds when the machine is running. I had the sensor within 2mm of the magnet and had no reading but when I moved it further out I got these erratic readings. The magnet is glued in a shallow hole in the cast iron pulley shown in the second photo. Could the iron be causing this? |
| vtsteam:
I don't think the magnet should be recessed like that. It's probably being shielded by the cast iron. Can it be moved flush or slightly proud? Or maybe moved to another location where it is attached to aluminum? |
| NormanV:
That's what I was wondering, I meant to mount it flush but drilled the hole a bit deep. The only rotating aluminium is the pulley and there is no space to mount it. |
| tom osselton:
What kind of magnet is it would a rare earth magnet be better? |
| Navigation |
| Message Index |
| Next page |
| Previous page |