ACU-RITE CSS I/O Users Manual - Manual (Page 12)

10 I Operating Instructions
I - 2 Spindle Speed Contr
o
l (RPM)
Voltage Offset / RPM Source
The voltage offset field is used to adjust for any inherent offset in the
DAC output. This value is added to the calculated DAC output. Use
a voltmeter to measure the actual voltage at the DAC output. Press
the INCREASE, or DECREASE soft key to adjust the offset until the
output is 0 V. The offset range is limited to 0 - 50, (approximately
0 - 122 mV).
8 Press ENTER to save the settings, and exit the form, or press the C
key to exit without saving the changes.
The RPM source allows the user to define whether the RPM source is
from an actual rotary encoder, or calculated by the software as a
replacement for a rotary encoder.
User speed limits can be established to limit how fast, or slow the
spindle may be run. These are run time limits, and must fit in within
the actual hardware limits.
8 Press ENTER to save the settings, and exit the form, or press the C
key to exit without saving the changes.
When in Setup mode, the status bar will display the current spindle
speed in RPM’s shown in the S: field on the status bar.
To set a specific spindle speed, the DAC output S
Out
uses this linear
relationship to determine the corresponding output voltage V
Out
:
V
Out
= 10 • (S
Out
- S
0
) / (S
10
- S
0
) + V
Offset
Press ENTER to save the parameters and exit the input form. Press
the C key to exit without saving the changes.
These are the physical limits of the machine.