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Chapter 8 Appendix
8-1 Examples of Settings for Cutting Parameters
Example Settings
This machine lets you perform cutting using a wide variety of workpiece materials and cutters. However, the optimal
cutting parameters that yield the desired cutting results for these combinations vary widely.
The table below shows suggested cutters and cutting parameters suited to various types of workpieces. Refer to these
when selecting the cutting parameters. Before you perform actual cutting, carry out a cutting test and adjust the
parameters as needed.
Tips for Fine-tuning
The optimal cutting parameters are determined by a balance of such factors as the hardness of the material, the feed
rate, the spindle rotating speed, the cutting-in depth, and the capacity of the cutter. Refer to the following tips and try
fine-tuning the parameters.
Spindle Rotating Speed
In general, faster rotation provides increased cutting capacity. However, a feed rate that is too slow with respect to the
spindle speed may lead to melting of the workpiece due to heat, or to increased burring or roughness. Roughness may
also occur at some places because feed stops momentarily at places where the direction of engraving changes (that is,
at corners). Lower the spindle speed. It may also be a good idea to use faster settings for narrower cutters and slower
settings for wider cutters.
Feed Rate
Faster speeds result in shorter cutting times, but the cutting load also increases accordingly. The load may overcome
the strength with which the workpiece is secured in place, resulting in crooked lines or a nonuniform cutting-in depth.
Also, a feed rate that is too fast for the spindle rotating speed may result in roughness or a raised nap. Lower the feed
rate.
Cutting-in Depth
Deeper cutting-in results in a greater cutting load, and roughness becomes more likely. When you make the cutting-in
deeper, it is a good idea to raise the spindle speed and lower the feed rate accordingly. Note, however, that there is a
limit to the maximum depth. When deep cutting-in is required, it is a good idea to perform double cutting and reduce
the amount of cutting-in per pass.
Workpiece
composition
Acrylic
Aluminum
Brass
Chemical wood
Modeling wax
Cutter type
ZEC-A2025
ZEC-A2320
ZEC-A2025-BAL
ZDC-A2000
ZEC-A2025-BAL
ZDC-A2000
ZEC-A2025
ZEC-A2320
ZEC-A2025
ZEC-A2320
Spindle speed
(rpm)
10000
10000
12000
No rotation
12000
No rotation
12000
10000
10000
10000
Cutting-in
amount
(mm)
0.2
0.2
0.1
-
0.1
-
0.4
0.5
0.5
0.8
Cutter feed rate
X- and Y-axis
feed rate
(mm/sec.)
15
15
5
10
5
10
30
30
30
30
Z-axis feed
rate
(mm/sec.)
5
5
1
1
1
1
20
5
10
5