Lenze 8400 TopLine - Manual (Page 1537)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
1537
19 Function library
19.1 Function blocks
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Function
Elasticity is a measure of how far the load have moved from the ideal setpoint position at motor
standstill due to mechanical force effect.
• Example: "Hoist":
Due to elasticity of the mechanical transmission elements, the real position of the "hook" varies
in loaded and unloaded status.
• In order to compensate errors caused by elasticity, the actual torque at the nTorque_a input is
applied. This torque is a measure for the current load.
• The multiplication by an elasticity factor results in an angle compensation value which is added
to the setpoint angle correctly signed depending on the direction of the torque. This serves to
correct the false position of the load.
• The elasticity factor is selected in the form of numerator and denominator via C01048/1 and
C01048/2 .
• C01047/1 serves to select a static correction value (offset).

Note!
Please note that the compensation may be reversed in case of a signed
numerator/denominator selection of the elasticity factor!