I built a coreXY sand table for the Milwaukee MakerFaire in September. The table is about 2 m x 1 m and has “printable” area of 735 x 1570 mm, lit with red and blue LEDs along the long sides.
The mechanism is made using 3D printed parts in a classic stacked-belt corexy configuration. It uses a SmoothieBoard 3D printer controller to play files from an SD card. Some details and photos here. I run this table with a 1/2" ball at 500 mm/sec with acceleration set to either 1000 or 2000 (can’t remember the last value I tested). It has NEMA-23 motors because that’s what I had on hand.
I have recently rewired it to make it neater and it’s a big improvement, but I want to do more to make it quieter and more convenient to send files to it and to select files to play:
- use NEMA-17 motors for reduced noise and vibration
- rebuild the sand box with thinner bottom to allow a gap between the magnet and the table bottom to reduce noise
- new controller with 256:1 ustepping drivers to reduce noise and vibration
- Ultimately I plan to build or buy a glass top table or just the glass top and then rebuild the whole thing to make it more like furniture.