So I am working on a project where there is a part about the size of a paperback.
It has several holes and other geometries that would require several angled setups, although thankfully, it would only need to be rotated around one axis.
This makes me think I could make a simple indexing jig that is essentially an indexer, but with an extended platform and a support bearing on the side opposite the indexer. This would allow me to make a fixture that would hold several parts (they are only about an inch thick) at once, and rotate them manually so that the various angled holes could be drilled.
My question is, is making a fixture like this practical? It seems like it should be. Two bearings blocks with some nice bearings, and a manual indexer that would allow me to rotate the parts.
I'm concerned about accuracy, however given I could justify using some pretty good bearings and making the support blocks pretty much as thick as I like, and since the parts are only about 3" radius from the axis I'd rotate them around, I'm hoping I got lucky here and this is a practical solution.
I want to be able to use the fixture without any indicating. Just hit a mandatory stop in the program, then index manually, then continue the program. Of course any amount of indicating while setting up the fixture is fine. But I suppose overall this means I need it to have some pretty good repeatability.
I suppose, you could make a tenths dial indicator part of the fixture, and as you manually index it, it could tell you how far you are from intended zero and maybe even have a little thumbwheel you could fine tune it to. That wouldnt be time consuming and so thats okay. (It sounds like I should use a good rotary table instead of an indexer).
My CNC does not have the ability to use a probe and I think this could be done without it anyway, this seems like a very straightforward thing to do, although I have not done it before and I'm hoping its a routine sort of thing.
I cant afford a CNC 4th axis and even if I could I suppose I'd still have to build the platform and support bearing on the other side anyway.
I definitely cant afford a 5th axis and I think I'd need a giant one to fit as many parts as I'd like anyways. This part would not justify the cost of that anyway.
It has several holes and other geometries that would require several angled setups, although thankfully, it would only need to be rotated around one axis.
This makes me think I could make a simple indexing jig that is essentially an indexer, but with an extended platform and a support bearing on the side opposite the indexer. This would allow me to make a fixture that would hold several parts (they are only about an inch thick) at once, and rotate them manually so that the various angled holes could be drilled.
My question is, is making a fixture like this practical? It seems like it should be. Two bearings blocks with some nice bearings, and a manual indexer that would allow me to rotate the parts.
I'm concerned about accuracy, however given I could justify using some pretty good bearings and making the support blocks pretty much as thick as I like, and since the parts are only about 3" radius from the axis I'd rotate them around, I'm hoping I got lucky here and this is a practical solution.
I want to be able to use the fixture without any indicating. Just hit a mandatory stop in the program, then index manually, then continue the program. Of course any amount of indicating while setting up the fixture is fine. But I suppose overall this means I need it to have some pretty good repeatability.
I suppose, you could make a tenths dial indicator part of the fixture, and as you manually index it, it could tell you how far you are from intended zero and maybe even have a little thumbwheel you could fine tune it to. That wouldnt be time consuming and so thats okay. (It sounds like I should use a good rotary table instead of an indexer).
My CNC does not have the ability to use a probe and I think this could be done without it anyway, this seems like a very straightforward thing to do, although I have not done it before and I'm hoping its a routine sort of thing.
I cant afford a CNC 4th axis and even if I could I suppose I'd still have to build the platform and support bearing on the other side anyway.
I definitely cant afford a 5th axis and I think I'd need a giant one to fit as many parts as I'd like anyways. This part would not justify the cost of that anyway.