should follow these steps:
• Replace or skim your sacrificial bed.
• Close any redundant vacuum
zones and cover any exposed areas in
the required zone. This will concentrate your vacuum directly on the part
that requires cutting.
• Ensure the surface of the sacrificial bed is clean and free of debris.
Any chips on the bed or part will stop
a strong vacuum being made under
What is the best way to process
There are several ways to prevent small
parts from moving on the CNC router.
Here are a few of the methods avail-
• Ramp into the material. Rather
than a making a direct plunge move-
ment, drive into your part as you
plunge the tool, leaving a “ramp” like
start to the cutting process. When the
tool is near the end of the cutting pro-
cess, it will meet the surface of the part
cut away during the ramping process.
• Use a finishing pass. This process
requires you to cut the majority of the
material leaving approximately 1/125
inch (0.2mm) around the part and 1/50
inch (0.5mm) on the base of your chosen material. You complete the processing by processing the rest of the material. This process reduces the amount of
force being applied to the part.
• Tabbing. These are small uncut
sections of the material attaching
the part to the waste material. This
method is widely supported by most
software and is a well proven method
of holding the part in place. However,
this requires further work after pro-
cessing your material.
In addition, selecting both the cor-
rect pressure foot and donut will aid
Source: Ged Lodge, the writer of both
articles is an applications specialist for AXYZ
International. For additional information call
800-361-3408 or visit AXYZ.com.
RED BOOK | April 2018 | woodworkingnetwork.com/redbook
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