USER MANUAL
POSITION CONTROLLER THESI 310
MT02_A37_A_TH310_GIVI_ENG rev. E
Pag. 14/44
Parameter 03
– ENCODER PULSE CORRECTION
The correction factor
CF
is entered by the operator to adapt the machine linear shifting to
the number of encoder pulses (PPR).
For instance, in a machine with linear shifting correlated to the screw pitch, the correction
factor
CF
is calculated by the operator according to the formula:
SCREW PITCH (mm)
CF = ---------------------------------------
(RIS * PPR * CNT)
Where: RIS = axis resolution (see parameter 06)
PPR = encoder pulses per revolution
CNT = counting mode (see parameter 04)
Suppose we have a 100 PPR encoder, a 0.01 mm resolution and a x4 counting mode.
Example A with 4 mm screw pitch, example B with 5 mm screw pitch:
in case
A
:
CF =
4 / (0.01 * 100 * 4) = 1.00000
in case
B
:
CF =
5 / (0.01 * 100 * 4) = 1.25000
To compensate shifting, a CF value has to be manually entered.
Example: CF value setting = 1.25000
P 03
Press
to select the parameter
(see PARAM. SELECTION)
1.0 0 0 0 0
P 03
Press
to confirm the selection and
enter its settings
0.0 0 0 0 0*
Enter the desired value and align it to the decimal point displayed.
P 03
Press
to confirm the value and go back
to parameters selection
1.2 5 0 0 0
Press
to quit configuration and go back
to the position display
2 0 0.0
