Home Search - Fagor CNC 8060 Installation Manual

2.5.19
2.
CNC 8060
CNC 8065
(R : 1709)
EF
·174·

Home search.

REFDIREC
Homing direction.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values: Negative / Positive.
Default value: Positive.
Associated variable: (V.)[ch].MPA.REFDIREC.xn
For analog and simulated axes, parameter REFDIREC indicates the axis moving direction
to begin the home search. For a Sercos axis, parameter REFDIREC indicates the motor
turning direction, which does not necessary have to be the same as the positive or negative
feedback reading (pulse counting) direction of the axis.
This parameter has no effect on spindles that are stopped and have no home switch. If the
spindle is turning, the CNC respects its turning direction to start searching home. If the
spindle has a home switch and is turning, the CNC stops the spindle and starts the home
search in the direction indicated by REFDIREC.
REFMODE
Home search mode.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a position-Sercos drive.
Possible values: Drive / CNC.
Default value: CNC.
Associated variable: (V.)[ch].MPA.REFMODE.xn
This parameter indicates who manages the axis home search.
Value. Meaning.
Drive. The drive homes the axis as if it were a position-Sercos axis.
CNC. The drive homes the axis as if it were a velocity-Sercos axis. The CNC executes
the parameter matching as if it were a velocity-Sercos axis.
DECINPUT
The axis/spindle has a home switch.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and Sercos drives.
Possible values: Yes / No.
Default value: Yes.
Associated variable: (V.)[ch].MPA.DECINPUT.xn
If the axis has a home search but no distance-coded reference marks, the axis moves up
to the home switch, then it reverses the movement and when it releases the home switch,
the home switch is enabled. If the axis has a home switch and distance-coded reference
marks, the axis needs not reach the home switch in order to find the reference mark.
On spindles with home switch, the home search algorithm runs two passes over the home
switch. The first pass is run at the speed set in REFFEED1 and it serves to calculate the
position of the home switch. The second pass is run at the same speed until reaching the
home switch, going over it a the speed set in REFFEED2 and doing the usual home search.
When there is a home switch, the CNC does not search home on the go, depending on
whether it is turning in M3 or M4; the home search is always done in the direction set by
REFDIREC.
I n s ta ll a t io n ma n u a l.