Adjustment Of Torque Precontrol - KEB Combivert F5 Instruction Manual

Parameter description
3.9 Adjustment of pretorque function
1) Preparations
• Enter motor data
• Connect load weighing equipment to X2A.3 and X2A.4
• Switch on the pretorque with Lb.7 =1
• Drive the cabine to the middle of the shaft
• Remain at the same position in the shaft when carrying out the measurements
• Carry out measurements during standstill of the motor after the brake has released
• Adjust the brake release time to 3 s to get a better measurement
2) Measurement with empty cabine
• Measure the signal of the load weighing equipment with LI.52. This value „L1" is displayed in percent.
• Measure the torque including the sign with LI.10.
• Calculate the torque "T1" in percent according to formula: T1 = LI.10 • 100 / motor rated torque .
3) Measurement with 100% load in the cabine
• Measure the signal of the load weighing equipment with LI.52. This value „L2" is displayed in percent.
• Measure the torque including the sign with LI.10.
• Calculate the torque "T2" in percent according to formula: T2 = LI.10 • 100 / motor rated torque.
4) Calculate the amplification according to formula LA.12 = (T1-T2)/(L1-L2).
5) Calculate the Offset according to formula LA.14 = LA.12•L1-T1.
6) Enter the caluculated values in LA.12 and LA.14.
Examples
Example 1:
Empty cabine LI.52 = L1 = 0 %
Full cabine LI.52 = L2 = 100 % (10 V)
Example 2:
Empty cabine LI.52 = L1 = -5 % (-0,5 V)
Full cabine LI.52 = L2 = 80 % (+8 V)
GB - 60
Payload
Speed
Motor rated torque
Counterweight balance
Gain LA.12 = (100 %-(-100 %))/(0 %-100 %) = -2
Offset LA.14 = -2•0 %-100 % = -100 %
Payload
Speed
Motor rated torque
Counterweight balance
Load weighing signal has an Offset of -0,5 V and can give out only 8 V at 100 %.
Gain LA.12 = (108 %-(-132 %))/(-5 %-80 %) = -2,82
Offset LA.14 = -2,82•(-5 %)-108 % = -93,9 %
2000 kg
1 m/s
1200 Nm
50 %
(0 V) LI.10 = +1200 Nm
LI.10 = -1200 Nm
2000 kg
1 m/s
1000 Nm
45 %
LI.10 = 1080 Nm
LI.10 = -1320 Nm
T1 = +100 %
T2 = -100 %
T1 = +108 %
T2 = -132 %