Are your cuts lacking that high-quality finish you were hoping
for, even though you’re using the right tools and hold-down
system? If the answer is yes, then you may need to examine the
way you’re plunging your tools into the material. In most cases,
a vertical plunge is perfectly fine, but sometimes, when using
certain tools and materials, there may be better methods.
Use a ramp
A ramp is created when the cutter drives down at an angle to the
surface of the sacrificial bed. This allows the tool to cut with the
side edge as well as the bottom. It also creates a channel for the
chips to be removed. There are three types of ramps:
Smooth: By entering a measurement value, the cutter will
drive from the surface to the bottom of the cut in a single pass.
Zigzag: This will program the machine to move in a back
and forth motion and pierce the material at the bottom in the
same position where the tool first started cutting.
Spiral: This controls the cutter to make a full revolution of
the part before cutting to the bottom of the material. If cutting
multiple passes, the tool will spiral to the bottom of the material
in as many passes as is programmed before completing the cut.
Use a lead-in
An alternative to ramps is the lead-in start. This is where the tool
plunges into the material off of the part, then cuts towards the
profile and continues around the part. There are two types:
Straight line: Entering the distance of the angle for the tool
to travel before it makes contact with the part.
Circular: Requires the radius and length before it makes
contact with the part.
Source: AXYZ Automation. Call 800-361-3408 or visit AXYZ.com.
How to improve CNC cutting using lead ins & ramps