Inspired by the awesome Sisyphus Table by Bruce Shapiro, http://www.sisyphus-industries.com/, Zen gardens that my mom used to love, and the crazy CoreXY belting system.
This is my attempt at an easily sourced automated Zen Table.
Amazing patterns are easily possible by using Sandify, https://github.com/jeffeb3/sandify, This table would be nothing without this tool! (feel free to show some appreciation for this amazing free piece of software).
Printed Part Name
|1||ZXY Motor R|
|1||ZXY Motor L|
|1||ZXY Corner R|
|1||ZXY Corner L|
|1||ZXY Roller R|
|1||ZXY Roller L|
|1||ZXY Belt Clamp|
|1||ZXY Stop Block|
** Substitute F or J for ZXY for the other models.
|2||Nema 17||Shop, Amazon|
|2||GT2_16t Tooth Pulley||Shop, Amazon|
|8||GT2 16t Idler||Shop, Amazon|
|GT2 Belt||Shop, Amazon|
|5||Cable Ties||Shop, Amazon|
|14||608 Bearings||Shop, Amazon|
|5||Bearing Spacer||Shop, Amazon|
|2||Roller Limit Switch||Shop, Amazon|
|4||SCREW 6/32 x .75″||M3.5 or M4 x20|
|4||LOCK NUT 6/32||M3.5 or M4|
|4||BOLT 5/16 x 2″||M8x50|
|1||BOLT 5/16 x 1.5″||M8x40|
|5||BOLT 5/16 x 1.25″||M8x30|
|10||Locknut 5/16″||M8 Locknut|
Since every table will be a different size a cut calculator is a bit difficult.
1- Y Rails. I suggest putting the outer corners into your build and measure the distance from the outer clamp loop, that gives you your Y rails lengths.
2- Y rails Square. Once you have the Y rails in place assemble the rollers and make sure the bolts heads do not hit the table as they move. Once you have this clearance established and you get the rails installed squarely by measuring the diagonals and making sure they are as equal as possible.
3- X rails. The X rails are 1/8″ shorter than the distance between the Y rails measured at the closest point.
Questions comments and concerns can be addressed most quickly for this through Github.
You can also generate patterns with your CAM software, All sorts of things can be done with a DXF and CAM. Cursive text looks great, and can score you some points with that special someone that thought you forgot about them while you were building this table…
Karl’s Way allow for some custom vector graphics to be easily drawn. Here in the Forum.
This is running coreXY belting and requires homing Y before X, as set in the firmware. You need two endstops wired Normally Closed on the X and Y. If you are facing the two steppers and looking down at them, the left one should be plugged into X the right one into Y, both plugs facing the same direction, if it does not move correctly, power down unplug and flip them both over. It is more confusing then the regular Cartesian troubleshooting.
Beta firmware until my new table is finished. 16T GT2 pulleys.