HEAVY CNC NY USA 🇫🇷

01 juil. 2020 22:43

Topsie, thank you for all of your work and for sharing your amazing design. I'm well under way with parts ariving daily.

My build will be 1000x1500. This past weekend I finished my workbench/ base. Have been printing around the clock. The parts I have left to print are the X-axis upper interior and exterior, dragchains and drag chain supports.

Here are a few pics.

08 juil. 2020 23:57

Hi @Peter Donovan!

Your pics aren't displaying correctly, because you have shared the url to the page that hosts the image, instead of the image directly (endind by .jpg, for example)

You don't are affraid in printing several big parts at once? If your printer has a problem, you may need to re-print all parts again! And for some of them, you if you have printed it in others directions (rotating the piece in the slicer) you won't need supports.

Nice to see your X and Y-axis mounted, feel free to share more pics of your project, the community is growing fast here! :)

30 juil. 2020 18:29

David, Thank you

I was worried at first but in an effort to finish faster I took a chance. I have since assembled near everything. As for the direction of the parts, I found certain orientations were Cooling and warping the glass bed 😲. I'll add some new photos of the process.

I had to modify a few parts due to the NEMA 17's I'm using have a 34mm x 34mm mounting pattern. Also for the 1.5m X-Axis I Made a different bearing support which mounted to the outer side of the X_Axis upper. This allowed me to add tension to the T8 Lead to reduce the whip.

I have also opted for to use this controller with TMC5160 drivers.

30 juil. 2020 18:44

Here are the progress pics up to today. I'm printing endstop mounts now.

01 août 2020 08:21

Hi Peter! Nice to see your project is almost complete! 👍

I'm interested to see your mods to X-Axis, because mine is 1500mm too, and with some speeds, I have some "vibration" which T8 leads don't like it! 😅

Do you have made any test, or cut something?

01 août 2020 10:53

David, I should make a few test cuts today. I was setting up my limit switches and soft endstops. Was doing some testing and trying to figure out where to ground my shielded signal wires to.

As for the tensioner, I've tested it up to 3000mm/m and have virtually no whip now.

https://www.thingiverse.com/thing:4558472/files

Its loosely based on this. https://www.youtube.com/watch?v=rbl3L-VATmU

I think I may redesign it using an actual T8 nut with some sort of locking knob.

01 août 2020 11:59

Thank you very much Peter!

I was wondering why did u use a pulley, until I look at YouTube video you have shared. And it's a very good idea, I will for sure use it. My TopsCNC is 1500 x 1500 mm, and I have some whip on Y-axis (my speed is 3000mm/min) but on X-axis it's like on video, and sometimes the nema17 stalls (so I have to reduce max speed). I will try this idea on both axis. 😉

Don't forget to share with us your first cuts and thoughts about this wonderful CNC! 😀

01 août 2020 12:08

I will, @DavidC , what NEMA17 Motors are you using?

These should be fully compatible with both X and Y axis just mount them on the out ward side, then tension appropriately.

I went with these to get the maximum torque and power without going to NEMA 23

https://www.omc-stepperonline.com/nema-17-stepper-motor/nema-17-bipolar-18deg-79ncm-111896ozin-23a-42x42x67mm-4-wires

The one thing that I had to do was make adapters to fit the concentric ring as well as the mounting holes which are @ 31mm on TOPSIES parts but these steppers are 34MM on center.

01 août 2020 12:48

@DavidC Update tested to 6000mm/m Zero Whip

Scratch that small amount of whip at the extreme Negative side on the X axis. When the Carriage is closest to the Stepper ( I have the X mounted on the Left Side.) I get a small amount of whip for about 100mm then zero whip. I'm sure 6000mm/m is more than enough for my uses I may dial it back to 5000mm/m.