CNC Setup Utility Manual
P/N 70000490C - Machine Constants
All rights reserved. Subject to change without notice.
10-December-04
2-77
VDC) increases as spindle speed increases (in reverse or forward
directions). The maximum voltage,
±
10 VDC, is output at the highest
RPM value of the gear range.
Setting Spindle Gear Ranges
Reference machine constant parameter:
MC_2972: Gear ranges used
.
NOTE:
The DC output is a linear value based on the high setting for the
M40 gear range.
Depending on the mechanical considerations of the system, the spindle
drive may not require gearing and belt drive arrangements to provide the
required spindle speeds and torque.
You can use the Setup Utility to set either one gear range or up to four
separate gear ranges.
To set up for only one gear range, switch MC_2972 to
Single-M40
[Default]. To set up for multiple gear ranges, switch MC_2972 to
Multiple
.
When you set only one gear range, a programmed gear range is not
required during spindle operation. For example, a command to activate a
DC spindle drive at 1500 RPM reverse direction would be programmed as
S1500 M04.
When you set multiple gear ranges, the CNC assumes DC spindle
operation. You can program up to four separate gear ranges (
M41
,
M42
,
M43
, and
M44
). Each gear range specifies a minimum and a maximum
speed for the range. The CNC program requires three entries for spindle
operation commands:
gear range
,
speed
, and
direction
, as follows:
Gear range and speed
M42 S1500
Direction
M03
At the highest RPM in the range, the system outputs the maximum DC
voltage, +10 VDC. 0 RPM always represents 0 VDC. The lowest RPM
voltage is a ratio of the highest speed to the lowest speed. For example,
if M41 has a range of 1,000 RPM to 10,000 RPM, then 10,000 RPM
results in 10 VDC and 1000 RPM results in 1 VDC.
Defaults are as follows:
MC_2961: Low setting for M40 gear range
[Default:
50
rpm]
MC_2962: High setting for M40 gear range
[Default:
6,000
rpm]
MC_2963: Low setting for M41 gear range
[Default:
50
rpm]
MC_2964: High setting for M41 gear range
[Default:
6,000
rpm]
MC_2965: Low setting for M42 gear range
[Default:
165
rpm]
