[jfong]

Rotary laser engraving is now possible using Laserweb4/Smoothieware

The k40 laser barely fit my Harmonic Drive Rotary. Will have to build a smaller one for the laser.

https://youtu.be/UoGlDKjPGSE

[1Jumper10]

Sweet!!

Sent from my Pixel XL using Tapatalk

[jfong]

Received replacement parallel port, network and USB cards from eBay china. That fixed all three cnc controller PC's.

I narrowed down the X3 mill Z servo motor as having damaged encoder output. Using a oscilloscope, I found The complementary differential outputs were still good. I just unsoldered the A/B wires and moved them, easy fix.

Almost 2 months later, the Workshop is up and running again. All four cnc's plus laser are now working.

[jfong]

Testing out the new 32bit ARM LPC1768 port of grbl-lpc. It's much faster than atmega328 version.

https://github.com/gnea/grbl-LPC

It will run on Smoothieboard, Cohesion3d, MKS, re-ARM and others that use the lpc1768. I use the re-ARM in these videos.

https://youtu.be/PYkcFCs6ZFg
https://youtu.be/O3NwQxUiyS4

[jfong]

Some laser fun. Drink coasters, map of Middle Earth. Laserweb4 and Smoothie sure makes the K40 a much easier and more reliable laser cutter.

[jfong]

Took a long time searching eBay but finally found three matching NSK ground ballscrews for my mill. 10mm pitch, 14mm diameter. $260 for all three. More than I wanted to pay but they are in fine condition. The ballscrews are longer than needed so will have to be cut down to size. My summer project....

[jfong]

Most recent item I made. 3d printed rotary for the laser.



https://youtu.be/c_CwmfQNdzA

https://www.thingiverse.com/thing:3060428

[jfong]

https://youtu.be/xjhEENP9bwQ

Testing linear axis speed for a large format CO2 laser build. Speed is more than fast enough for a laser. I don’t expect to need more than 500mm/sec for most laser cutting or raster. Pretty good for a small nema17 stepper.

With acceleration/deceleration, the average speed in the video is about 1600mm/sec or 3800in/min.

1000mm length move
2000mm/sec velocity
20,000 mm/sec^2 acceleration

THK HSR15 Linear Rail 1200mm length mounted on OpenBuild 20x40 vslot extrusion
Nema17 Stepper 1.7amp 76oz-in
GT2 20 tooth 2mm pitch belt
Cohesion3D board running Smoothieware
DM542 Stepper Driver at 45volts
8 microstep
Using THK AFC High Speed Grease.

[jfong]

https://youtu.be/QKdoydIUb0Q


Another rotary version I made. Lower profile for smaller K40 size cutters.


https://www.thingiverse.com/thing:3068792