Mitsubishi Electric M800VS Series Connection And Set Up Manual page 477

M800VS/M80V Series Connection and Setup Manual
22 Setting the Position Detection System
22.1 Adjusting the Absolute Position Detection System
The axis stops when it reached the first grid point.
(9)
(10) Set the "Zero-P".
Move the cursor to "Zero-P" with the [ ↑ ] and [ ↓ ]
keys. Input the distance from the basic machine coor-
dinate zero point to the grid point immediately preced-
ing the basic position in the input area then press
[INPUT].
The zero point initial setting is now complete. After initializing all axes, turn the power OFF and ON.
Start point
Basic machine coordinate
system zero point
Zero return parameter
"#2037 G53ofs"
"#2 Zero-P" (#2059 zerbas=1)
 (6) to (10) in this diagram indicate steps of the operation procedure.
Note
 To change just the basic machine coordinate zero point, set "#0 Absolute posn set" and "#2 Zero-P", and then turn the
power OFF and ON.
 If aligning the axis to the marked point is attempted without passing the grid point even once after turning the power ON, the
operation message "Not Passed on grid" will display. Return to a point before the last grid, and then repeat from the step of
aligning the axis on the marked point.
 If the first grid point is covered by the grid mask (#2028 grmask) as a result of return to the electric basic position in the step
(8), the axis stops at the next grid point. Note that reference position shift amount (#2027 G28sft) is invalid.
 Confirm the "absdir" setting if the machine does not move in the direction of "#2050 absdir" in step (8). The machine will
move only in the positive direction when set to "0" or the negative direction when set to "1".
IB-1501613-A
(6)
(10)
Reference
position
446
State: [Complete]
Machine position: Current machine position
Setting "Zero-P"
When the machine is set up for the first time or when the
grid point has changed because of replacement of motor
and encoder, set the distance from the basic machine co-
ordinate system zero point from the grid point (electric ba-
sic position) to "Zero-P".
(When you set mechanical reference position as basic ma-
chine coordinate system zero point, set the display value of
"Machine end" to "Zero-P".)
When you perform zero point initial setting due to the dis-
appearance of the absolute position, the grid point (electric
basic position) does not change; therefore, there is no need
to set "Zero-P" again.
(7)
(9) (8)
Mechanical basic
position
Grid point
(electric basic position)
"Machine end"