Mitsubishi Electric C70 Setup Manual page 137

MITSUBISHI CNC
7 Setting the Position Detection System
Reference position return direction (#2030 dir (-))
The direction of the (axis) movement, after the dog-type reference position return is executed and the limit switch kicks
the dog and decelerate to stop, is set to either positive "0" or negative "1".
Set "0" if the reference position is in the positive direction from the near-point dog.
Set "1" if the reference position is in the negative direction from the near-point dog.
When reference position return direction is positive (+)
Movement in (+)
direction
( - )
Dog
Axis with no reference position (#2031 noref)
Set "0" for the axis to carry out dog-type reference position return and the axis for absolute position detection.
Set "1" for the axis without carrying out reference position return during the relative position detection.
Machine coordinate system offset (#2037 G53ofs)
Set the amount to shift the basic machine coordinate system zero point position from the reference position.
When "0" is set, the reference position will be the position of the basic machine coordinate system zero point.
In "G53ofs" parameter, set the position of the reference position looking from the basic machine coordinate system zero
point with the coordinates of basic machine coordinate system. By the reference position return after the power is turned
ON, the machine position will be set and the basic machine coordinate system will be established.
Selection of grid display type (#1229 set01/bit6)
Select the grid display type on DRIVE MONITOR screen during dog-type reference position return.
0:Distance from dog OFF to electric zero point (including the grid mask amount)
1:Distance from dog OFF to electric zero point (excluding the grid mask amount)
120
When reference position return direction is negative (-)
Movement in (+)
Movement in (-)
direction
direction
( - )
(+)
Reference position
Reference position
Movement in (-)
direction
(+)
Dog