Calibration Of Encoder - piezosystemjena NV40/3 Bedienungsanleitung

example 2:
This example shows the sequence of the commands to move the actuator with the
NV120/1CLE from the minimal position 0µm to 35,46µm:
command response
[Enter] NV120CLE
setk,1 none
cloop,1 none
set,35.46 none
rk rk,35.460

8.3.5 calibration of encoder

The encoder of NV40/3[CLE] e.g. NV120/1[CLE] is used for the calibration of the attached
actuator in open and closed loop. The encoder has a resolution of 30 detent / rotation.
With each step of the encoder an internal counter (EncIncre) within the scanning interval
(SI), will be incremented or decremented, depending on the direction of rotation. After
scanning interval the NV40/3[CLE] calculates a new stroke () or voltage (deltaValue),
depending on the mode (EM). The actuator will be charged with this calculated value.
EncIncre will be clear the encoder and the procedure start again.
The values of the encoder can be analyzed by 3 different modes (EM):

normal with acceleration (EM0)

adjustable interval (EM1)

adjustable interval with acceleration (EM2) calculation deltaValue:
encoder commands generally:
call: encmode,<0 to 2>
answer: none
call: enctime,<0 to 255>
answer: none
Scanning interval (SI) can be adjusted in a range between 0 and 5.1sec with a step size of
0.02 sec. The evaluation of the encoder will be done in this time period. In each interval only
one encoder can be evaluated! This means, if you have 3 active channels and an adjusted
interval of 1 sec. the encoder will be scanned in an interval of 3 seconds.
call: enclim,<1...65535>
answer: none
If the absolute value of deltaValue is higher than enclim, deltaValue will set to enclim with
the same prefix.
The above-named commands are valid for all modes.
Geschäftsführer: Dr. Bernt Götz • Telefon 03641/66880 • Fax 03641/668866 • www.piezosystem.com
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content
after pressing the [Enter] key on the computer keyboard the
prompt shows "NV120CLE>" in the HYPER TERMINAL
program
activates the remote control
switches to closed loop mode
set the actuator to 35.46µm
displays the set value
chart 4: example for remote control NV120/1CLE
calculation deltaValue:
EncExponent
deltaValue = EncIncr
calculation deltaValue:
deltaValue = EncStep
deltaValue = EncIncr * EncStep
example: encmode,1
the mode of encoders is set to EM1
(adjustable interval)
example: enctime,2
scanning interval (SI) is set to 0.04 sec
example: enclim,10000
the step limitation is set to 10000