Hi Guys
Since getting my kress making pcb's on my machine is down to a tee, however my current problem is that the boards are never flat, I cannot afford a floating head, nor do I have a lathe yet to make one.
Now I was using MDF and the surfacing wizard in mach 3, and I am pretty damn certain that the problem is the mdf.
So I have a load of 6" wide Aluminium (1/4" depth). So my question is how best to make the bed hold the pcb's?
I need 4 posts as offsets for when doing double sided boards, these also help make sure the board is alligned, my problem is I was using M3 threaded rod for the posts, but have snapped my 2 Taps for threading the holes (I was drilling 2.5mm holes, prob a tiny but more as my pillar drill is not very good)
However I have had success making M4 holes for some reason.
Initially i was going to make little aluminium plates bolted down onto the outer rim of the board, but after playing with it, it seems 3 M4 cap screws on each side of the board may suffice, what are your thoughts?
My other idea was to get some ali sheet, cut out the middle a little smaller than the board, and drill some holes, and lay that over some threaded rod that sticks up from the bed, then use nuts and washers to hold it down.
Im thinking that just using cap screws may be the easiest.
My other problem is that I only have 3.175mm and 8mm collets for my kress, so my machine cann drill the holes, and using the pillar drill is not accurate enough for my tastes.
What about milling the holes with say a 2.4mm bit?
What are your thoughts?
Any advice on tapping? I take it there is no easy way to tap holes using a Taig Mill?
Ive messed up two beds so far, am trying not to mess up anymore
DJH