Siemens SINUMERIK Series Function Manual

K3: Compensations
4.3 Backlash compensation
Extended Functions
234 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
4.3.2 Dynamic backlash compensation
4.3.2.1 Description of functions
Dynamic backlash
A dynamic backlash can occur for machine types with sliding guides. Depending on the axial
dynamic response (velocity, jerk, etc.) used to approach an end position, the machine slide
reaches the programmed end position or stops earlier because of the static friction. The
resulting position error is direction-symmetric.
Compensation
To compensate for the dynamic backlash, half the signed compensation value
(MD32456Commissioning (Page 235), see "") is applied in accordance with the relevant
trave
rsing direction of the axis. Compensation value is applied as ramp.
Activation
The dynamic backlash compensation is activated by the PLC only in required the situations:
DB31, ... DBX25.0 (activate dynamic backlash compensation)
Note
The machine tool manufacturer specifies in the PLC user program the "required" situations
for the activation of the dynamic backlash compensation. Such situations result with traversal
of 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)
Requirement
The axes to be compensated must be homed.
Display
The 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 compensation
calculated from LEC, mechanical and dynamic backlash compensation.

Siemens SINUMERIK Series Specifications

General

Axes Control	Up to 31 axes
Category	Control Unit
Manufacturer	Siemens
Series	SINUMERIK
Control Type	CNC
Communication Interfaces	Ethernet, USB
Operating Temperature	0°C to 45°C
Protection Class	IP20
Power Supply	24V DC
Display	Color TFT LCD