Vertical Axis Pull Up Control - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

9-4-3 Vertical axis pull up control

Even when the vertical axis drop prevention control is used, the axis may drop several µm due to
mechanical play of the motor brakes. This function raises the axis by a 2.8deg. motor angle before the
brakes are activated to retract the vertical axis upward during an emergency stop or power failure.
Emergency stop (EMG)
Motor position
Motor brake control output (MBR)
Contactor control output (MC)
READY ON signal (READY)
<Setting and adjustment method>
<1> Complete the adjustment explained in "9-4-2 Vertical axis drop prevention control".
<2> Increase the vertical axis drop prevention time (SV048) by 100ms from the value adjusted in <1>.
<3> Set SV033.bitE to ON.
<4> Set the torque offset (SV032). (The setting value is the same as the lost motion compensation
adjustment.)
No. Abbrev. Parameter name
SV033 SSF2 Servo function
selection 2
SV032 TOF Torque offset
SV048 EMGrt Vertical axis drop
prevention time
CAUTION
9. Adjustment
OFF
ON
OFF
ON
ON
OFF
ON
OFF
0
Vertical axis pull up control operation sequence
The vertical axis pull up control starts with the following parameters.
F E D
zup
bit
E zup Vertical axis pull up control stop
Set the unbalance torque for the vertical axis and slant axis.
The vertical axis pull up control compensation direction is determined by this
parameter's sign.
Vertical axis pull up control is not carried out when 0 is set.
The axis is pulled up during drop prevention time, so set a value of about
100ms.
This function is valid for the Z axis in the vertical machining center. Basically it
cannot be used with the horizontal machining center's Y axis or the lathe's X axis
as collisions could occur. Check the machine's working conditions carefully before
using this function.
Axis
rise
2.8deg (When PIT=10, raise 80µm.)
100
Explanation
C B A 9 8 7
dis
Meaning when "0" is set
9 - 32
When SV048 is set to 100
200 300
Time (ms)
6 5 4 3 2
nfd2 nf3 nfd1
Meaning when "1" is set
Vertical axis pull up control start
Setting
range
1 0
-100 to 100
(Stall
current %)
0 to 20000
(ms)