Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 135

Screen selection Parameter
SPINDLE NC sgear
PARAMETER
stap 1
stap 2
stap 3
stap 4
stapt 1
stapt 2
stapt 3
stapt 4
SPINDLE PGT
PARAMETER
SPECT
GRA1 ~
GRA4,
GRB1 ~
GRB4
EGEAR
< Precautions >
1) Accurate synchronous tapping is difficult when the spindle is driven with a belt or timing belt in
the semi-closed method (when there is no spindle encoder), due to the stretching, slipping,
etc. of the belt.
Use an encoder when driving the spindle with a belt, and carry out synchronous tap with the
closed method. Use the encoder method orientation in this case.
2) Set the spindle parameter EGAR to 1 when the spindle and encoder are connected by a
2:1 speed ratio in the closed method (when there is a spindle encoder).
Also set the spindle NC parameter sgear to 1.
8. Adjustment Procedure
This sets the gear ratio between the spindle and spindle
encoder. Always set this to 0 (1:1) when there is no
spindle encoder (semi-closed method).
Gear00, Gear 01, Gear 10, Gear11
Set the max. spindle speed during the constant
inclination tap cycle in each gear.
Gear00, Gear01, Gear10, Gear11
Set the time constant to the max. tap speed during the
constant inclination tap cycle in each gear. The setting
method is the same as that in tap-tl above.
This sets the position loop gain during synchronous tap.
This must be set to the same value as parameter
PGN1SP of the (Z axis).
.....
bit5 This sets the rotation direction of the detector
(spindle encoder) during synchronous tap. Set
to 0 for semi-closed method.
.....
bit3 Set to 1 for stronger excitation during
synchronous tap. The response to the impact
load increases. Normally set to 0.
.....
bit0 0: Closed (spindle with encoder)
1: Semi-closed (spindle without encoder)
.....
bit4 This determines the motor command direction
(spindle rotation direction in G84) during
synchronous tap.
.
bitE=0 A zero point return is carried out at the first of
the synchronous tap mode.
.
bitE=1 The position loop is entered after the
deceleration stop without carrying out a zero
point return.
The gear ratio (No. of gear teeth) of each gear stage
must be accurately set.
Motor shaft side No. of gear teeth
(GRB1 to GRB4)
Motor speed ×
Spindle side No. of gear teeth
(GRA1 to GRA4)
= Spindle speed
This sets the gear ratio between the spindle and spindle
encoder. Always set this to 0 (1:1) when there is no
spindle encoder (semi-closed method).
8 − 16
Details Setting value
0
Standard: 0
0 ~ 99999 (rpm)
0 ~ 5000 (msec)
1 ~ 100
Standard: 10
−−
−−
0
Standard: 0