Siemens SINUMERIK Series Function Manual

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K3: Compensations4.3 Backlash compensationExtended Functions234 Function Manual, 03/2013, 6FC5397-1BP40-3BA14.3.2 Dynamic backlash compensation4.3.2.1 Description of functionsDynamic backlashA dynamic backlash can occur for machine types with sliding guides. Depending on the axialdynamic response (velocity, jerk, etc.) used to approach an end position, the machine slidereaches the programmed end position or stops earlier because of the static friction. Theresulting position error is direction-symmetric.CompensationTo compensate for the dynamic backlash, half the signed compensation value(MD32456Commissioning (Page 235), see "") is applied in accordance with the relevanttraversing direction of the axis. Compensation value is applied as ramp.ActivationThe dynamic backlash compensation is activated by the PLC only in required the situations:DB31, ... DBX25.0 (activate dynamic backlash compensation)NoteThe machine tool manufacturer specifies in the PLC user program the "required" situationsfor the activation of the dynamic backlash compensation. Such situations result with traversalof the axes with G1, in the JOG mode or with the handwheel.The NC uses the following interface to return the required activation to the PLC:DB31, ... DBX102.0 (active dynamic backlash compensation)RequirementThe axes to be compensated must be homed.DisplayThe compensation value that belongs to the current actual position is displayed in the"Diagnostics" operator area of the "Axis/Spindle Service" window as the total compensationcalculated from LEC, mechanical and dynamic backlash compensation.