Epoxy granite vertical mill build log

[silopolis]

Hi Nick,

Very very nice project! I'm planning the exact same machine but first option is to use steel tubes filled with EG. Second is directly casting EG like you did. Anyway, will follow with great interest.

Would you mind sharing your model for study, or maybe just give us dimensions of base and column?

Thanks for sharing your experience, this surely prove helpful at some point...

Cheers

Envoyé de mon ONEPLUS A5010 en utilisant Tapatalk

[Nick]

Sure, it's not quite finished and I have had some difficulties with exporting it. All the joints have gone, does the iges file below work?

https://www.dropbox.com/s/6w12be2b4w...0v19.iges?dl=0

The rails are from the Hiwin website and I've used these models off grabcad

https://grabcad.com/library/lichuan-servo-60st-m01...
https://grabcad.com/library/ac-servo-110sy-04030-1
https://grabcad.com/library/bt30-spindle-2

The design is based around the cast iron surface plate and blocks that I bought, I think this has resulted in the base being too narrow and long.

I think with hindsight starting with a welded steel filled epoxy structure would of been a good idea.

I look forward to your build, let me know if I can help

[Nick]

Some progress today, managed to cast the table.

[Chaz]

Good to see that you are still at it.

[Nick]

Some progress:

It started to look a bit like a mill:



Next step was to flatten the base casting so I could get the rails on. It was to big an area to scrape and the reference surface and base were to heavy to invert. So I blocked off two rail sized areas with wood and then used an angle grinder to lower the rest of the surface, a bit crude but worked well.



I then flipped my surface plate and lowered it onto the base. It wasn't that far off, you could see damage from the previous owners of the surface plate.



After several rounds of scraping, it is flat to about 0.02 - 0.03 mm



Y axis and saddle installed:



Next step is to flatten the Z-axis rails, im using the same process as with the base, flipping the surface plate, it's really slow going.

[Nick]

More progress, rails installed, steppers installed on temp 3D printed mounts, temporary head and spindle.

First axis movements (Y axis not working):

https://www.youtube.com/watch?v=rAVX...ature=youtu.be



Next steps:

Alignment, use mill to mill better mounts, mill permanent head BT30, servos, way covers.

Does anyone have any experience with the cheap AC servo's on aliexpress? In particular the 60ST-M01930? Not found much on these.

Has anyone bought way covers from aliexpress? I was thinking about getting some "Armoured bellow cover"?

Nick

[JAZZCNC]

Does anyone have any experience with the cheap AC servo's on aliexpress? In particular the 60ST-M01930? Not found much on these.

Where you located Nick.? Says E yorks.? Anywhere near Goole.

I've got some 400W waiting to go on a machine which are exactly the same drives and motors just lower power. So if you want to have a play with them on the bench your welcome to come over. For the money, they can't be beaten.

Edit: Actually just had thought.? They could actually be 600w I had set of 400w and 600w but fitted one set to a machine and I think they where the 400w. I'll Check when I get back to work on Monday.