Instruction manual

8 - 10
8 OUTPUT MODULE
8.2.2 Parameter list
The ball screw parameters are shown in Table 8.2 and the parameters shown in this
table are explained in items (1) to (7) below.
Refer to the help of MT Developer for the ball screw parameter setting method.
Table 8.2 Ball Screw Parameter List
No. Setting Item Default Setting range
1 Output axis No. 0
Q173DCPU : 1 to 32
Q172DCPU : 1 to 8
2 Output unit mm mm inch
3 Ball screw pith (P)
4
Number of pulses per ball
screw revolution (N
P)
Must be not set.
It is controlled with the fixed parameter.
5 Permissible droop pulse value 6553500 1 to 1073741824 [PLS]
6 Upper stroke limit value 214748364.7
7 Lower stroke limit value 0
-214748364.8 to
214748364.7 [µm]
-21474.83648 to
21474.83647 [inch]
8 Speed limit value (VL) 0
0.01 to 6000000.00
[mm/min]
0.001 to 600000.000
[inch/min]
9
Torque limit value setting
device (1 word)
— -(300[%]) / word device (D, W, #, U \G)
10 Comment None 32 characters
(1) Output unit
(a) This device is used to set the unit ([mm]/[inch]) of ball screw.
(b) Set the same unit as used in the real mode (unit in the fixed parameters) for
the ball screw unit.
If the ball screw unit differs unit in the real mode, a mode switching error will
occur at the switching from real mode to virtual mode.
(2) Ball screw pitch(P)/Number of pulses per ball screw revolution(NP)
(a) The ball screw pitch connected to the servomotor and number of pulses per
ball screw revolution are displayed.
Ball screw
Ball screw pitch (P)
Number of pulses per ball
screw revolution (N
P)
(b) The travel value per pulse is calculated by the ball screw pitch and number
of pulses per ball screw revolution as the formula below.
P
[Travel value per pulse] =
N
P