| The Craftmans Shop > New from Old |
| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
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| awemawson:
Never mind, I have a boring bar holder with a nicely finished 50 mm outer diameter, so I could sweep round the outside of it just as well as in internal hole. :thumbup: Then there was a slight detour making a rigid DTI holder to go in the chuck and off I went tweaking turrets again! But first I roughly marked the quadrant points on the 50 mm diameter, as judging them from the odd angles that you are forced to use isn't easy. So repeat of the previous exercise and setting it went pretty easily, tapping the tool disk slightly to get an exact centre position. The X error as displayed at this point was -0.197 mm which can be corrected by applying a 'grid shift' by entering half the error in microns into a parameter - or so the procedure said :hammer: I went all over the place, error increasing, error unchanged I was going scatty, until it dawned on me - the measurement and error correction values are being measured using a system that already has (wrong) compensation applied. Starting again having set the compensation to zero all went to plan in a matter of minutes. Of course in the factory they go onto the commissioning floor already with zero in the parameter so no need to mention it :bang: So, remount the tools, reset all the tool offsets, remake the 10 mm spigot and try again. SPOT ON - the sleeve slides nicely from dowel to spigot when X=0 . . . . phew |
| nrml:
Any updates on the Renishaw probe? |
| awemawson:
It supposedly was going to be posted on 19th Feb but nothing has been received. I emailed PK on Tuesday 5th asking how it was sent but as yet I've received no reply. All very frustrating :( :scratch: |
| tom osselton:
So what is the purpose of the 3 mm ditch in the turret any ideas? |
| awemawson:
I'd love to know Tom. The only pictures a bit of Googling gives me seem to show circular pockets on other manufacturers tool disks. :scratch: I've posed the question on the Practical Machinist Forum so hopefully someone with more experience than I will give us the answer :med: |
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