Pa2_18 Deceleration Time At Ot During Homing; Pa2_22 Detection Time For Contact-Stopper; Pa2_23 Torque Limit For Contact-Stopper - Fuji Electric Alpha7 VV User Manual

CHAPTER 4 PARAMETER

PA2_18 Deceleration time at OT during homing

No.
Deceleration time at OT
18
during homing
Specify the deceleration time taken after +OT or -OT is detected during homing motion.
Specify the time taken to decelerate from 2000 [r/min] to 0 [r/min]. Determine the setting under
consideration of the homing speed and moving range after the OT sensor. ("0.7" in the equation
indicates the safety factor.)
4 [Example of calculation of reference value]
Moving range after OT × 0.7 = Homing speed × Reduction ratio × Ball screw lead
× (Homing speed/2000 [r/min] × Deceleration time after homing OT/1000/60) × 1/2
30[mm]
× (1000.00 [r/min]/2000 [r/min] × Deceleration time at OT during homing /1000/60) × 1/2
Deceleration time at OT during homing = 1260.0 [ms]
+
Speed
-
+OT
 If 1 (stop) is selected with parameter PA2_24 (selection of operation at OT during homing), stoppage
occurs according to parameter PA2_60 (third torque limit). In this case, the homing motion is
stopped upon detection of OT.

PA2_22 Detection time for contact-stopper

PA2_23 Torque limit for contact-stopper

No.
Detection time for
22
contact-stopper
Torque limit for
23
contact-stopper
These parameters are enabled if "5" (Stopper) is selected for the reference signal for shift operation
(PA2_11), or "1" (Encoder Z-phase) is selected for PA2_11 and "4" (Stopper) is selected for reference
signal for homing (PA2_12).
Enter these parameters to perform homing in applications such as positioning of a cylinder or the like
where the home position LS or +/-OT cannot be used.
Enter the stopper contact detection time and dead stop torque limit.
Refer to "Typical homing profiles" for details.
4-52
Automatic Operation Setting Parameters
Name
0.0 [ms] to 99999.9 [ms]
×0.7 = 1000.00 [r/min] × (1/5) × 20 [mm]
Homing speed
Deceleration time at homing OT
Time
Acceleration time 1 or acceleration time 2
ON OFF ON
Name
0 [ms] to 10000 [ms]
0 [%] to 100 [%]
Setting range
The acceleration time and
deceleration time are based on
2000 [r/min].
+OT and -OT are generally
normally closed contact signals.
Setting range
Default
Change
value
100.0 Always
Default
Change
value
0 Always
0 Always