Fingers crossed it'll cut ally

[blackburn mark]

Why is it that no matter how careful i am measuring and marking out i allways end up having to oval a slack hand full of holes, each time i start a new project i think " this is it now, im on it, iv learned by my mistakes and THIS time its all gona work like a bobby dazzler"...........Bollocks!!! there must be a tare in the space time continuum cause im buggard if its me! :)

anyway, its starting to look like my drawing now, i drilled all the holes using my larger diy spindle and my Y axis up-ended as a sort of pillar drill (didnt want to be swinging around with a hand held)

im pretty sure ill have to oval a couple more holes when it comes to trueing it up but iv got a sh*t load to do before its finished and i dont want to think about it :)

(anyone thinking of useing helli mode on a RC speed controller, dont bother, it dosnt seem to hold revs any better than standard and it has a slow wind up to speed so every time you jam your drill you have to pause for it to catch up)

[Jonathan]

(anyone thinking of useing helli mode on a RC speed controller, dont bother, it dosnt seem to hold revs any better than standard and it has a slow wind up to speed so every time you jam your drill you have to pause for it to catch up)

Slow wind up to speed - isn't that the govenor setting, if so surely it can be switched off?
I think the only way to hold revs if to have some sort of direct feedback (optical or something) of the motor RPM, and get mach3 to control the RPM as I detailed earlier.

I should really buy the ER25 collet for my massive brushless motor....it's occured to me that I can still get the 100mm one and make it longer. Drill an 8mm hole in one end, and whack a piece of 12mm with one end turned down to 8mm and knurled into the hole. The annoying thing is the motor only does 6000prm, which isn't so good as a router...but nice for machining aluminium.

Oval holes: same here, the worrying thing is I *did* use the CNC mill for the holes! I didn't make them oval though, just drilled the 8mm holes out to 9mm