Thread: New CNC Mill on the horizon
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12-06-2015 #281
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The Following User Says Thank You to JAZZCNC For This Useful Post:
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12-06-2015 #282
Here #165 i make some comparison of different materials for bed. Have to agree with Dean that the best material i found is phenolic sheet/ for sacrificial bed/.
Furthermore if your machine is well done, you say- cut through deep to 0mm and it cuts through but without even scratching the phenol. Not so cutting aluminum though, where you have to find the sweet spot.
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18-06-2015 #283
Right. So we decided on the aluminium sheet with a matrix of holes in the end. After looking at parts we are likely to produce chances are we too will be using spoil board 75% of the time. So that's turning up next week. Went for 20mm thick sheet.
So all I really need to sort now before the machine can start properly cutting is the water cooling. Any suggestions on a water pump? I've found a bunch on eBay but some seem too low powered 5w solar type and others seem too high pressure ? 80psi or there abouts. Any pointers to specific pumps used recently the older posts links are now dead.
Finally. Cutters.
What's a good cutter to start with using in aluminium on a 3kw spindle? Single flute? Just want something to experiment with really
And as far as machining hardwoods I have a bunch of high quality router cutters would these be best for this application?
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27-06-2015 #284
Just had some problems with the x axis locking up when going at a reasonable speed. Convinced we still have a problem with the ball nuts I have taken them apart only to find 53 balls which is 18/18/17 in terms of 3 tracks.
Am I right in thinking 17 balls per track and that having too many could cause this binding at a higher speed?
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