Rotary Table CNCing

[John S]

Use an Oldham coupling, Lovejoy couplings don't take misalignment into account.

I have done one of the 4" tilting units, the cheap and nasty ones just to see if a type17 motor will run it, yes it does but only for positioning, not enough power to overcome cutting forces if you want to machine say an arc.

.

[irving2008]

Use an Oldham coupling, Lovejoy couplings don't take misalignment into account.

I have done one of the 4" tilting units, the cheap and nasty ones just to see if a type17 motor will run it, yes it does but only for positioning, not enough power to overcome cutting forces if you want to machine say an arc.

.

John,

Where is the misalignment? using my proposed tube mounting approach everything is concentric. And I have several LC couplings going spare.

I am using a type 23 1Nm unit which I have here, but I could get a 1.85Nm type 23 from Zapp if needed. I measured the torque needed to turn the table and the 1Nm motor should be able to give about 5rpm for positioning and 1/2 of that for cutting, assuming alloy only (20N cutting forces as per other discussions on torque). My main interest is not cutting arcs but engraving handwheels and cutting gears...