Dogless-Type Absolute Position Zero Point Initialization Set; Machine End Stopper Method Manual Initialization - Mitsubishi Electric C70 Setup Manual

MITSUBISHI CNC
7 Setting the Position Detection System

7.3.3 Dogless-type Absolute Position Zero Point Initialization Set

7.3.3.1 Machine End Stopper Method Manual Initialization

Use GOT project controlled by sequence programs, switches on the machine operation panel, a manual handle, and the
[ABS. POSITION SET] screen in the CNC monitor on GOT for the absolute position zero point initialization set. The GOT
project and panel switches are made by the machine tool builder.
Basic machine
coordinate system
zero point
Reference position return
parameter "#2037 G53ofs"
(1) Display [ABS SERVO MONITOR] screen from [TOOL PARAM].
(2) Set the current (torque) limit value for when the axis is pushed against the machine end stopper to "#2054 clpush
Current limit(%)".
The value to set is the ratio of the rated current value of servomotor. Set the appropriate value in accordance with
the machine specifications.
(Note) Setting the excessive value may cause damage to the machine, as well as overload warning and
overcurrent alarm. Setting too small value may lead to the incorrect detection of stopper since the system
will identify the machine's friction load.
122
Start
Axis movement
Reference
position
basic position
#2 "ZERO"(when "#2059 zerbas" is set to "1")
#2 "ZERO"(when "#2059 zerbas" is set to "0")
The parameter "#2059 zerbas" decides the absolute position basic point.
0: Position where the axis was stopped
1: Grid point just before stopper (electrical basic position)
Input Area Input Area
(8)
(11)(10)(9)
Position where the axis
Electrical
was stopped
Machine
end
Coordinate