Haas Vector Drive 20HP Troubleshooting Manual page 5

Vector Drive - Troubleshooting Guide - CHC
Short Circuit Inspection
Corrective Action:
Inspect the spindle motor cables. Make sure the spindle motor cables are not contaminated or pinched.
Inspect the vector drive. Disconnect all the vector drive terminals and do the following tests:
Set your meter to Ohms test mode.
• Put the black lead on chassis with the
red lead measure terminals 4 (A), 5 (B)
and 6 (C).
If the meter does not show OPEN (O.L) the vector
drive is damaged.
Set your meter to Ohms test mode.
• Put the black lead on terminal 2 (+) with
the red lead measure the motor output
terminals 9 (A), 10 (B) and 11 (C).
The meter should show high resistance readings
typically in the Kilo or Mega ohms. If the meter
reads very low resistance the Vector drive is
damaged.
Set your meter to Ohms test mode.
• Put the black lead on terminal 3 (-) with
the red lead measure the motor output
terminals 9 (A), 10 (B) and 11 (C).
The meter should show high resistance readings
typically in the Kilo or Mega ohms. If the meter
reads very low resistance the Vector Drive is
damaged.
Set your meter to Ohms test mode.
• Put the black lead on terminal 3 (-) with
the red lead measure terminal 1 (R).
If your meter reads less than100k ohms, the
vector drive is damaged.
Page 5 of 9 pages