Etel DSC Series User Manual

ETEL Doc. - Operation & Software Manual # DSC2P 903 / Ver. F / 3/6/05 Chapter C: System functions
Operation & Software Manual
Direct Drives & Systems 211
The sensitivity for a linear correction is then one thousandth of per cent. Parameter K169 can be positive or
negative: from - 50000 to + 50000. If K169=0, there is no correction.
Remark: If (position - K168) exceeds +/- 2
31
, the encoder scaling correction will be discontinuous. It means
that the user can move around the position given by parameter K168 from -2
31
to +2
31
dpi.
Caution: Infinite rotary movement cannot be used!
13.13.2 Encoder mapping
A look-up table (L0) of correction with 2000 points can be programmed and saved in the controller. This look-
up table contains the correction values in dpi to be applied on the reference position of the axis.
Parameter K166 defines the position of the scale from where the correction, defined by the point 0 of the look-
up table, will be applied. This parameter enables the setting of the correction table on the scale.
Parameter K167 defines the length in dpi on which the look-up table corrects the set point. The value of
parameter K167 is from 0 to 2
31
-1. This correction is subtracted from the set point reference (theoretical
position).
• Linear encoder mapping
• Rotary encoder mapping
To apply cyclic corrections on one motor's turn, parameter K167 must be set to include the distance in [dpi]
corresponding to exactly one turn. Thus, when a negative or positive distance given by parameter K167 has
been covered (from parameter K166), the same look-up table is applied again and again as long as the motor
is moving. To activate the rotary encoder mapping, parameter K165 must be equal to 4.
Available on DSC2P DSC2V DSCDP DSCDL DSCDM
K166
K167
Starting point of the correction
0 in dpi after
homing
Scale, absolute
position in dpi
Scale, absolute
position in dpi
Corrected area of the scale with the look-up table L0
Point 0
Point 1999
of the lkt
of the lkt
K166
K167
Starting point of
0 in dpi after
homing
the correction
Starting point of
the correction
K167
Point 0
Point 1999
of the lkt
of the lkt
Point 0
of the lkt
Point 1999
of the lkt
Corrected area of the scale
with the look-up table L0
Corrected area of the scale
with the look-up table L0
Point 1999
of the lkt

Etel DSC Series Specifications

General

Brand	Etel
Model	DSC Series
Category	Controller
Language	English