Open-loop Start-up
15
Verify Mechanical Brake Timing
The mechanical brake should be dropped
during the DC injection stop time (DC STOP
TIME (A1) parameter), see “Mechanical
Brake Timing at Stop” on page 17.
Decrease Decel Jerk Out Rate
•
Decrease jerk rate via DECEL JERK
OUT x (A2) parameter and observe
performance.
Decrease DC Injection Stop Frequency
•
Decrease the DC STOP FREQ (A1)
parameter in increments of 0.1 Hz and
observe performance.
Undershooting Floor
If the car is undershooting the floor then until
resolved, try the following (in order):
1. Verify Mechanical Brake Timing
2. Increase Leveling Speed
3. Decrease Decel Jerk Out and Decel
Rates
Note: if no performance change is observed
after any one step, set any changed value(s)
back to the original value(s) before
proceeding onto the next step.
Verify Mechanical Brake Timing
The mechanical brake should be dropped
during the DC injection stop time (DC STOP
TIME (A1) parameter), see “Mechanical
Brake Timing at Stop” on page 17.
Increase Leveling Speed
•
Increase leveling speed and observe
performance
Increase Decel Jerk Out and Decel Rates
•
Decrease jerk rate via DECEL JERK
OUT x (A2) parameter and observe
performance
•
Secondly, decrease decel rate via
DECEL x (A2) parameter and observe
performance
Overshooting Floor
If the car is overshooting the floor then until
resolved, try the following (in order):
o
Verify Mechanical Brake Timing
o
Decrease Leveling Speed
o
Increase Decel Jerk Out and Decel
Rates
o
Decrease Motor Mid Voltage parameter
Note: if no performance change is observed
after any one step, set any changed value(s)
back to the original value(s) before
proceeding onto the next step.
Verify Mechanical Brake Timing
The mechanical brake should be dropped
during the DC injection stop time (DC STOP
TIME (A1) parameter), see “Mechanical
Brake Timing at Stop” on page 17.
Decrease Leveling Speed
•
Decrease leveling speed and observe
performance
•
Note: practical minimum for leveling
speed is about 2.5 Hz.
Increase Decel Jerk Out and Decel Rates
•
Increase jerk rate via DECEL JERK
OUT x (A2) parameter and observe
performance
•
Secondly, increase decel rate via
DECEL x (A2) parameter and observe
performance
•
Note: When increasing the Decel and
Jerk Rates watch for spotting or stalling.
Decrease the Motor Mid Voltage Parameter
•
Decrease MOTOR MID VOLTS (A5)
parameter (decrease increments of 0.5
and observe performance)
•
Note: When decreasing the Motor Mid
Volts parameter, watch that the drive
does not start stalling (especially with
full-load)