Owner`s manual
Blind-Hole splines in 1/8" DELRIN. Use 24-tooth gear as
spline geometry:
Use These Numbers in Visio
Type
Spline
Radius
Screw
radius
Power
Speed
Remarks
Large servo
.133"
100
45
raster (filled gear), 2 passes. .bmp image=.276"
.048"
50
2
Cut vector (.047" radius screw hole), 1 pass
Medium
servo
.123"
100
45
raster (filled gear), 2 passes. .bmp image=.254"
.047"
50
2
Cut vector (.047" radius screw hole), 1 pass
Through-Hole splines, 24 tooth:
Type
Gear Diam.
Power
Speed
Remarks
Large Servo
.245"
50
2.5
Cut vector gear, 2
passes
Medium
Servo
.225"
50
2.5
Cut vector gear, 2
passes
19. Gears: You can make good spur gears with the laser cutter. Delrin is what we use for this. Here is an
inexpensive, clever gear-generator program: http://woodgears.ca/gear/. Note that the gears produced do
not have any kerf compensation. The program is on the laser cutter computer.
20. Smallest Feature Size: Visio (or the ULS M300 printer driver) doesn‘t appear to pass a circle of less
than 0.008‖diameter. No object will be cut below this dimension.
21. Delrin roller bearing example (as shown in the library .vsd drawing):
a. Bearing diameter: Cut 8x 0.1104‖-diameter (0.0552‖ radius) roller bearings.
b. Cut inner sleeve: 0.108‖ I.D. (0.054‖ radius), 0.178‖ O.D. (0.089‖
radius). The I.D. will accept a 4-40 screw for mounting.
c. Cut inner race of outer part 0.37‖ I.D. (0.185‖ radius).
d. Mark (‗X‘) the top of every part. Rollers assemble
upside down with regard to races.
e. Cut two inner-sleeve geometries out of Xerox
transparency material or acetate film for spacers. Spacers
can also be realized by leaving the protective film on in
the correct places on the bearing holders. This is done by
laser scoring and removing just the film in areas where
the thin spacer is not needed.
22. Ball-bearing race: This is tricky but works well (for this
particular laser cutter at least). The race is ―cut‖ as vector circular
paths with the lens 1.0‖ out of focus; position the table 1.0‖ lower
than the focus point. At this grossly out-of-focus position, the
laser beam cuts a smooth, wide trough. The beam has an
astigmatism, as well as a slight angular Z-axis misalignment (to
the lower right) which must be accounted for by moving the