
4. CONFIRMATION OF
B-65165E/02 START-UP PROCEDURE THE OPERATION
- 71 -
4.3.6 Observing Data Using the Spindle Check Board
4.3.6.1 Overview
By using the check board, you can convert digital signals used for
control in the spindle amplifier module to analog voltage, and observe
the conversion result with an oscilloscope. The internal data can be
indicated also with the five-digit display.
• A20B-2001-0830
This model has two analog output channels (CH1 and CH2) at
which the internal data (with output of -5 V to +5 V) can be
observed. It also has CH1D and CH2D at which specific bits such
as data bits can be observed.
• A20B-1005-0740
This model outputs internal data (output of 0 to 11 V) at terminals
LM and SM using the analog output circuit for the load meter (LM)
and speedometer (SM).
4.3.6.2 Major characteristics
Item A20B-2001-0830 A20B-1005-0740
Measurement point CH1, CH2 CH1D, CH2D LM, SM
Output voltage
range
-5 to +5 V H: 2 Vmin
L: 0.8 Vmax
0 to 11 V
Resolution About 39 mV
(10 V/256)
- About 43 mV(11 V/256)
Output impedance 10 kΩmax 10 kΩmax 10 kΩmax