Data Interfaces And Current Collection; Selecting The Speed - Grizzly G0875 Owner's Manual

6.12

Data interfaces and current collection

When connecting data interfaces make sure that the data cable runs to the control unit interface
via the shortest possible distance. The cable routing can be conducted along the measuring
system lines. However the cable in the switch cabinet must never be routed near the drive units
of the NC axis or the frequency converter itself. Electromagnetic radiation causes errors during
data transfer (EMC problems).
The control is equipped with the following data interfaces. They are located laterally on the con-
trol panel of the CNC-maschine:
RJ45 plug- in connection

USB connection

Connection for power supply

6.13

Selecting the speed

The correct speed is an important factor for milling. The speed determines the cutting speed by
which the cutting edges cut the material. The service life of the tool can be increased and the
working result optimized by selecting the correct cutting speed.
The ideal cutting speed basically depends on the workpiece and the tool material. Higher
speeds are possible with tools (mills) made from hard metal or cutting ceramics than with tools
made from high-alloy high speed steel (HSS). You will achieve the ideal cutting speed by
selecting the correct rotation speed.
Please refer to the following standard values or a table reference book (e.g. Tabellenbuch Met-
all, Europa Lehrmittel, ISBN 3808517220) to determine the correct cutting speed for your tool
and the material to be cut.
The required speed is calculated as follows:
V
----------- -
n =
π d ×
n = speed in rpm(revolutions per minute)
V = cutting speed in m/min (metres per minute)
d = tool diameter in m (metres)
6.13.1 Standard values for cutting speeds
[m/min] with high-speed steel and hard metal for upcut milling.
Tool
Plain milling cutters and shell end mills
[m/min]
Relieved milling cutters [m/min]
Cutter head with SS [m/min]
Cutter head with HM [m/min]
This results in the following standard speeds, dependent on
mill diameter, mill type and material.
-62-
Operation
Version 1.0 dated 2017-7-4
Steel Grey cast iron
10 - 25 10 - 22
15 - 24 10 - 20
15 - 30 12 - 25
100 - 200 30 - 100
Translation of the original instructions
Al
alloy
case-hardened
150 - 350
150 - 250
200 - 300
300 - 400
F2
Model G0875 (Mfd. Since 3/19)
GB
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