Digital Servo Controllers
DSV 130 / DSV 132 / DSV 133
Operating Manual Rev. 1.8 www.engelantriebe.de Page 30
9.2 Resolver offset detection, motor poles
A basic requirement for operating a three phase synchronous motor is the exact current commutation. The
commutation is defined through the connection of the motorphases (U,V,W), the motor poles and the alignment of
the resolver angle to the angel of the motorsystem.
The motor poles (pole pairs x 2) are given in the motor datasheet and can be set under OPTIMISATION / CURRENT
CONTROLLER.
The alignment of the resolver is done by an automatic resolver offset detection procedure and can be started under
OPTIMISATION / CURRENT CONTROLLER.
Attention !
During the automatic resolver offset detection procedure the drive moves abruptly!
Please mind the following requirements:
- The motorshaft should be unloaded
- Current controller is tuned
- Motor poles are set correctly
- Attend to the hints displayed by DSerV
If the error code 10 appears, check the wiring of motor and resolver.
(False motor connection if the motorshaft has moved ccw first during the procedure)
9.3 Speed controller tuning
Notice:
Adjusting the speed controller does only make sense if the current controller is
properly tuned. If needed, tune the current controller as described in chapter 9.1
9.3.1 Tuning a motor system with a speed sensor (resolver, incremental encoder, tacho)
Step 1: Drive completely installed, wired and fully operational according to the set-up notes in chapter 7.
Step 2: Make sure that the rated and maximum current are set correctly and the current controller is properly tuned.
If needed, adjust the current controller as described in chapter 9.1.
Step 3: To optimise the speed controller, the drive’s dynamic behaviour has to be judged. Configure one of the
analogue outputs as speed monitor and visualise the output voltage using an oscilloscope.
Adjust the analogue output in the menu OPTIMISATION / ANALOGUE MONITOR.
Step 4: The parameters of the speed controller can be accessed in the menu OPTIMISATION / SPEED CONTROLLER.
For optimising the speed controller, switch the speed ramp off or set it to the maximum acceleration and
set the scaling of the set value according to the speed needed in that application.
First set the control parameters to uncritical values, i.e. low gain (approx. 0.05 .... 0.1) and high time
constant.
Step 5: Set the demanded speed to approximately 75% of the rated speed and enable the drive.
Judge the speed vs. time curve. Then disable the drive.
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