Setting The Grid Interval And The Reference Encoder For Grid Interval; Precautions Common For The Initialization Operation - Mitsubishi Electric M800W Series Connection And Set Up Manual

M800W/M80W Series Connection and Setup Manual
25 Setting the Position Detection System

25.1.6 Setting the Grid Interval and the Reference Encoder for Grid Interval

Set the parameters "#2041 grspcref (reference encoder for grid interval)" and "#2029 grspc (grid interval)" according to
the machine configuration.
(1) For semi-closed loop control
Set "0" (grid interval by the motor-side) to the reference encoder for grid interval.
Set the grid interval same value as the ball screw pitch.
If the reference encoder for grid interval is set to "1" (grid interval by the machine-side), the grid interval will be
required to set the moving amount calculation value per a motor rotation ("#2201 SV001 PC1" / "2202 SV002 PC2"
x "#2218 SV018 PIT").
(2) For full-closed loop control
Set "1" (grid interval by the machine-side) to the reference encoder for grid interval.
Set the grid interval same value as the Z phase pitch.
If the reference encoder for grid interval selection is set to "0" (grid interval by the motor-side), the grid interval will
be required to set the moving amount calculation value per Z phase pitch ("2202 SV002 PC2" / "#2201 SV001 PC1"
x the Z phase pitch of the machine-side).
Parameter settings of "Specify an encoder grid interval" and "Reference encoder for grid interval"
Loop control
Reference encoder for grid interval
Semi-closed
Full-closed
* If the grid interval is set to "0", the ball screw pitch (#2218 SV018 PIT) will be used instead of the grid interval.

25.1.7 Precautions Common for the Initialization Operation

(1) The "#0 Absolute posn set" parameter (axis for which zero point is to be initialized) can be set simultaneously for all
axes or individually for each axis.
(2) The "#0 Absolute posn set" parameter cannot be turned OFF with the keys. It is turned OFF when the power is
turned ON again.
(3) "#2 ZERO-P" can be set at any time as long as "#0 Absolute posn set" is set to "1".
(4) The grid point must be passed at least once after turning the power ON before initializing the zero point. If the grid
point has not been passed, the operation message "Not passed on grid" will appear at the "Machine posn".
(5) When the absolute position is established, the required data will be stored in the memory.
IB-1501268-K
#2041 grspcref
0: grid interval by the motor-side
1: grid interval by the machine-side
0: grid interval by the motor-side
1: grid interval by the machine-side
#2029 grspc
Grid interval
same value as the ball screw pitch
calculation value of "#2201 SV001
PC1" / "#2202 SV002 PC2" x
"#2218 SV018 PIT"
calculation value of "2202 SV002
PC2" / "#2201 SV001 PC1" x the Z
phase pitch of the machine-side
same value as the Z phase pitch
496
Calculation for the grid
interval
unnecessary
necessary
necessary
unnecessary