[LorenBMS]

Boring holes in the rotary table for thread inserts that will be used for mounting rails and the rotary head.

[LorenBMS]

Setup and boring holes for the aluminum bases for the rails on the rotary axis tailstock.

[LorenBMS]

I have been chasing oval holes. The aluminum really shows it. A is wider than B and it is pretty close to 45 degrees off of X or Y. Axis are calibrated , gantry squared using a large 3,4,5 triangle method, backlash measure and set to be compensated for in UCCNC. I have been lowering acceleration setting for both X & Y and have them quite low compared to where I started and not really impacting the results. It has me scratching my head a bit.

Any ideas?

[peteeng]

Hi Loren - are you bringing in a dxf through uccnc or code from another source? Peter

[LorenBMS]

G code from Fusion 360. Using the UCCNC post in Fusion

[peteeng]

Hi Loren - Not familiar with the F360 post yet so can't help. But if the post is converting circles to polylines that's your issue. I had the same issue the other day with Rhino to dxf to UCCNC. The dxf export was turning the circles into polylines so the 5mm dia holes came out as trilobes (using a 3mm cutter). Had to drill them to correct size. Peter

[LorenBMS]

I will look at the g code and see what it looks like it is generating.

[LorenBMS]

Fusion 360 and the UCCNC post processor are writing out G3 commands to bore the holes.

After sleeping on it some more I suspect it is the setting I have on the Clearpath motors for RAS (REGRESSIVE AUTO-SPLINE) settings. I contacted Teknic and the applications engineers are providing some guidance on settings. Hope to do some testing this evening with some parameters changed.

[LorenBMS]

I change the RAS setting to 9.8 and lowered my acceleration rate in UCCNC and have great results. The test cuts in wood are measuring within .001" as measuring around the clock on the part.

I set back up on the aluminum part and ran the tool path again and it cleaned up the holes pretty well and good enough for what the part is on the rotary.

[LorenBMS]

Putting together the tailstock and rails for the rotary axis.

Cutting some hard wood spacer blocks for the rotary head and tailstock.

[LorenBMS]

Woohoo! The rotary head arrived today. Now need a little time to get it all installed, connected and configured. It looks like a nice piece of hardware.

[LorenBMS]

It's ALIVE!

[LorenBMS]

First cuts on the rotary axis.

[peteeng]

Hi Loren - The hard work is now turning into fun (hopefully) Peter

[peteeng]

Hi Loren - That looks to be very nice plywood. What specification is it? Peter

[LorenBMS]

Yes, this is the fun part, although building the machine is enjoyable too.

The plywood is 13ply Baltic birch .689 thick with BB/CP grade plys. I can special ordered it through a local lumber supply store. It is what I used for building the machine.

[LorenBMS]

Getting the dust collection boot together. Cutting a couple of pieces to attached the brush to and embed magnets in both for quick removal for tool changes.

[LorenBMS]

The "boot" is stained and this is with the short skirt on it. I have another longer brush coming to make a second skirt with a longer brush for use on the rotary.

[peteeng]

Hi Loren - In your video what is your feed speed? Peter

[LorenBMS]

Hi Peter,

In the last video, I was using a carbide 1/4" 3 flutes down cut at 18K rpm and 150 ipm @ .375" depth of cut. I'm still exploring what the new machine will handle for speeds and feeds. It is so far above my old machine I'm trying to find new boundaries. It didn't seem to mind the above cutting.