Torch Table Design Rationale

See Torch Table for development work.

=Basic Design=


 * 6" wide by 1/4" u-channel frame
 * Gear rack drive, 20 degree gear rack, 1/2" wide, 20 pitch (20 teeth per inch)
 * 1" pinion gear, rides directly on rack
 * z-axis of torch has manual adjustment
 * Sacrificial slats may be used, or another workpiece table
 * 495 in oz Stepper Motors from xylotex, 1/4" shafts
 * About 31 in lb torque, or 1 G acceleration for a 60 pound gantry with 1" diameter driver gear
 * Gantry weight - about 90 lb, see below



Gantry detail
Gantry weight:

For this weight, acceleratio of motors is about 2/3 G