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M800W/M80W Series Connection and Setup Manual
25 Setting the Position Detection System
(*1) Low current limit value may prevent the basic movement of the axis. Do not set such a low value.
Set an appropriate value taking into account the acceleration torque and the friction torque.
When the current limit value is set too low, the servo error 3E (magnetic pole position detection error) may occur.
(*2) Depending on the setting value of the parameter "#2059 zerbas", the value set for "Zero-P" differ as shown in the
following figure.
Automatic initialization start point
Basic machine coordinate
system zero point
Zero return parameter
"#2037 G53ofs"
- (7) to (11) in this diagram indicate steps of the operation procedure.
(Note 1) 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.
(Note 2) If pressing against the machine end is attempted without passing the grip point once after turning the power
ON, the operation message "Not passed on grid" will appear. Return to a point before the last grid, and then
repeat from step of pressing against the machine end stopper.
(Note 3) 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 (11), the axis stops at the next grid point.
Note that reference position shift amount (#2027 G28sft) is invalid.
(Note 4) Acceleration/deceleration during movement at the specified push speed is performed in smoothing-off
(stepfeed) mode.
(Note 5) If "0" is specified for "#2056 aproch" of the absolute position parameters, the machine zero point is regardedas
the approach point.
(Note 6) Automatic initialization is interrupted if one of the following events occurs. If it is interrupted, [State] indicates
"Jog Start" (after selecting the "Auto init set" mode if it is caused by mode change), so restart operation from
the step of JOG-start.
- An absolute position detection alarm occurs.
- Operation preparation signal turns OFF.
- The mode is changed.
- The system is reset.
If [State] is "Complete" before automatic initialization is started, "State" returns to "Complete" when power is
turned OFF and ON again without restarting the operation.
Pushing speed
Reference
position
Absolute position parameter
"#2 Zero-P" (#2059 zerbas=1)
"#2 Zero-P" (#2059 zerbas=0)
491
(7)
(8)
(9)
(11)
Grid point
(electric basic position)
"Machine end"
Machine end stopper
(mechanical basic
position)
"#2056 aproch"
IB-1501268-K
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