Esko Kongsberg C series, Руководство пользователя

Страница: 107 / 268

12
Kongsberg C-series
Acrylic Bits or Multi Purpose Bits
1. Acrylic Bits (A) are polished, extra sharp for acrylic,
wood etc.
2. Multi Purpose Bits (MP) have a higher wear
resistance, and are suitable for aluface, plastics,
MDF, plywood, wood etc.
Multi Purpose Bits can be identified by a small
tooth at the tip (left hand bit on the picture).
Feed Rates
One-flute Bits do have a good chip flow, and allow
for large feed rates. 0.1-0.2 mm/tooth (0.004-0.008 in/
tooth) can be a starting point for optimization in most
materials:
This gives a feed rate of of 4-8 m/min (2.6-5.2 ips) at
40.000 RPM, and 6-12 m/min (3.9-7.9 ips) at 60.000
RPM.
Light materials, like PVC foam can be run much faster.
The surface finish or the
Power Consumption
will normally determine the final Feed Rate for an
application.
A large drop in RPM, or a high %Watt value in the
display, indicate too high Feed Rate .
Large diameter bits require more power than small
diameter bits.
Worn bits increase the
Power Consumption .
Number of Passes in Thick Materials
The Number of Passes depends on Material Type , Milling Depth and Bit Diameter .
Use a Pass Depth that makes the groove free of chips, normally that is a depth equal to the
Milling Diameter .
Material Hold Down
Material Hold Down may be a limiting factor. Small parts cut loose can be a problem.
This can be done to improve the situation:
1. Use Milling Bits with smaller Milling diameter .
2. Cover unused table area to increase Vacuum Hold Down Level .
3. Use Wash-Out functions instead of creating small waste parts.
107