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I haven't machined bearing fits yet, but I expect I'll just need to slow the feed rate down a lot to minimise the overshoot. When doing datum holes there is definite non-circulairies most notable at...

FM30F from CNC depot, 12krpm 3hp.

Long time no update, but the machine is basically finished in it's initial state (limited covers, no tool changer, no flood coolant).

It cuts really well, in the picture is some steel I've put an...

Haven't updated this is awhile, been doing some work on it lately though, finished the main base/bridge weldment design and got the parts tube laser cut, fairly pricey and I've just noticed there was...

Interesting, I hadn't considered that, thanks!

One year in, haven't had the time I was hoping so I've yet to get onto the main bit of the build! Though I have purchased the rail, screws, and servos/drives so I'm locked in...

However I'm soon...

I'd do that as a fixed connection, sure it might not be 100% technically accurate, but any simulation benefits from doing them as a sliding connection would be miniscule and likely below...

I'm not too sure on that one yet, given the thermal expansion factor I'm leaning towards a steel structure to support the bed, machining this flat, then using plate on top with a pretty consistent...

I've started the FEA, looks like the basic design of the upper bridge is pretty sound. 2x 125x9 SHS with 100mm separation (filled with 10mm plate at each side) gives 5 micron deflection for 300N at Z...

Sorry, meant to say it could have 1.5m instead of the normal 2m, this could be done by moving/removing the swarf tray so it's only the machine footprint at Ymax position.

I had looked at a more...

As in the title, I'm going for something with a small footprint, so have gone with a bridge style design, and mounted the rails underneath the bed with the carriages being fixed to the main frame....

It was made in two parts, which were pressed together, so it works as a single part.

quarter inch i think

Yeh, the optimal pressure angle for them is less than a quarter out anyway.

Plastic is fine, not much load on it due to tapers/pressure angles etc.

No, the thread angle on the nut makes it very difficult (and has never happened to me) to loosen by vibrations, and the vibrations are always across the whole spindle, not between the nut and it's...

Ask again in 7 years when the 10 years have passed :P

I haven't finished off the ATC part of this yet, it would be quite a lot of work to retrofit that sort of system to my existing router....

Yeh I see what you mean, but everything works well now and I don't really use the A axis number notation enough to get into bad habits I think.

Mach3 handles rotation inverse for the A axis I'm pretty sure.

I've got files for you, 25meg though, and I forgot my dropbox password... do you have one I could throw them into?

Test cutting a triple helix in some 25mm plastic round bar. Quite slow, I think...

No, but I'm not sure it should anyway, isn't part of the point of multi coord systems so you can clock it up to different features on the part.

It might be because my machine coord sys is not on the rotation center of the 4th axis. It was certainly doing much larger 'arcs' around that center than it should have been.

Your post has -180 on...

I think it takes that into account somewhere else already.

I've tried some 3axis with indexial CS and that works great.

Tried some 4x and it didn't work at all. Took some rework of my...

Sounds good, will run some test machining this weekend.

I've got it doing machine sims as it should now; in vmid file I had to adjust the rotation center in you file (as expected) but the tool...

I've had a brief look, but I seem to have forgotten a bit about the machine setup as I haven't got it to machine simulation correctly. From memory there are some table offsets or something,...

try 7zip?

Post how things are going in this thread and I'll offer advice as I can.

I still haven't got around to doing a proper ATC implementation on mine, just haven't spent the time bringing spindle rpm...

Good to hear, so is this the fanuc machine definition running with the postprocessor I made, or is it all fanuc?

How did you get it to do index rotation in solidcam?

Have you put the xml and step files in the machine location as well as the files in the postprocessor directory? you might need to change the cam part definition and set the machine file to those as...

The A axis is the one used (rotates around X), C is left in there as a dummy axis so I can use the 5 axis operation (you can lock C or otherwise render it unused).
I think in 2014 they changed the...

Have you tried this postprocessor (it'll do 3 axis no worries)? It is based on a mach3 one which works with no cleaning required for me so it should do the same for you...