Larger version of Solsylva Overhead Leadscrew CNC Router?

[jeffmorris]

Did anyone build a larger version of Solsylva Overhead Leadscrew CNC Router?

[flyboy1015]

I can't help with the overhead part as I built a dual leadscrew machine. Is this your first machine? What is your question?

[CarveOne]

I don't recall seeing one built from those plans at all, but I haven't searched for it. The Solsylva designs are generally laid out so that adding length to the affected parts should be a relative minor problem. I recommend doing some research on whether the overhead lead screw arrangement tends to induce more tendency to bind the x axis though.

CarveOne

[jeffmorris]

The overhead leadscrew CNC router was the first machine that I built. Its working area is 20 inches by 17 inches. I want to make a larger machine with working area of 36 inches by 24 inches but I want to use the parts from my machine instead of making a brand new machine, especially the Y-Axis/Z-Axis carriage that I built out of aluminum. I will have to build a new larger frame and gantry. I'm not sure if I want overhead leadscrew or leadscrew under the base/table for X-Axis. Putting the leadscrew under the base/table would make it easier for me to put large pieces of wood or plywood on the table. Would 200 oz/in stepper motors that I already have be powerful enough for the larger machine?

[CarveOne]

They probably will be powerful enough but you could use smaller diameters cutters and less cutting depth if they are marginal. The larger dimensions wouldn't add a lot of weight to the the moving parts. Chances are good that the only axis that might be affected at all is the x axis if it has to move more weight. I would use them and see what happens before ordering new steppers.

CarveOne

[grahamshere]

I think a lot depends on the drivers and lead screws, if your using something like gecko drive's you'd get more performance and even better if you use multiple start screws. graham