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| A little jiggy-jiggy |
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| Brass_Machine:
--- Quote from: AdeV on September 07, 2012, 05:21:00 AM ---Hi Eric, Yep - the plan is to chop the boring bar up into segments, these will be bolted to the bottom of the plate and will fit into the slots on the machine. By having 2 on the Y-axis & 2 on the X-axis, it should be impossible to put the plate in the wrong place; and it should be repeatable to within a couple of thou, which will save me loads of time when putting a sump on or off the machine. When I was making the original, I must have spent a good couple of hours (overall) lining the thing up and edge-finding for the DRO - this jig should save all of that hassle. --- End quote --- That's a great idea... I have used something similar on a few jigs. Not sure if it will apply here, but one thing I found was to attach the locating pins/blocks to the jig before doing machining on the jig. This was a way to ensure that it would be square from the start. |
| Brass_Machine:
--- Quote from: AdeV on September 12, 2012, 06:47:31 PM ---... Next job, while it's still accurately located, is to mill slots for the guide pieces to fit in, and drill the holes for the dowel pins. --- End quote --- Derp! And there it is... ignore my previous post. |
| AdeV:
Hi Eric - yep, you got it :) The underside of the jig is where all the accuracy happens, so it's staying bolted down now until the last drilling operation; which will happen soon (Sunday, I hope). Meanwhile, today, I did yet more hard sums :smart: :scratch: :scratch: :wack: :coffee: :med: - and finally cut a 1mm deep set of guide slots for the positioning blocks, thusly: Handily enough, they fit nicely, needing a gentle tap with the hammer to sit fully home. So tonight's final operation was to drill the mounting holes (5mm mill for 6mm tap); tweak the program, run, job done: So, the final drillings will be the dowel pin holes, I'll do all the tapping on the manual mill with the tapping head, I'm not confident enough to tap on the CNC machine yet... Anyway, that'll all have to wait 'cos it's late and I've got a long day tomorrow... there's a race to be had (not me driving this weekend, so I'm the pit crew), that's tomorow & Saturday out of the picture, next machining will be Sunday. :thumbup: |
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