Touch Probe - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Method for calculating a scale measurement encoder position
The scale measurement encoder position is calculated as follows:
Scale position = (2D37h (Scale ABS counter)  2D38h (Scale measurement encoder resolution)) + 2D36h (Scale cycle
counter)
17.2

Touch probe

The touch probe function is available to latch the current position by sensor input.
With this function, the position feedback of the rising edge and falling edge of TPR1 (touch probe 1) and TPR2 (touch probe 2)
can be memorized and stored into each object of 60BAh to 60BDh according to the conditions specified in Touch probe
function (60B8h).
The following shows the touch probe detection resolution. Enabling the high precision touch probe will disable the encoder
output pulses.
When a simple motion module RD77GF is used, the touch probe function is available with the servo cyclic transmission
function or servo transient transmission function. To use the simple motion module, set 60B8h to any transmit PDO or any
transmit SDO, and the objects 60BAh to 60BDh to any receive PDO or any receive SDO.
For settings of the servo cyclic transmission function and servo transient transmission function, refer to the controller
instruction manual.
Touch probe detection resolution
Input terminal
Encoder resolution
Related object
Index Sub Object
60B8h 0 VAR
60B9h 0 VAR
60BAh 0 VAR
60BBh 0 VAR
60BCh 0 VAR
60BDh 0 VAR
17 APPLICATION OF FUNCTIONS
544
17.2 Touch probe
[Pr. PD37] = _ _ _ 0 (Selection of high-precision touch
probe is disabled)
[Pr. PD37] = _ _ _ 1 (Selection of high-precision touch
probe is enabled)
Name Data Type Access
Touch probe function U16
Touch probe status U16
Touch probe pos1 pos value I32
Touch probe pos1 neg value I32
Touch probe pos2 pos value I32
Touch probe pos2 neg value I32
Touch probe1
TPR1
55 s
55 s
Default Description
rw  Settings such as enabling/disabling of the touch
probe function and trigger conditions
ro 0 Status information of the touch probe function
ro 0 Shows the rising edge position of TPR1 (touch probe
1). (Pos units)
ro 0 Shows the falling edge position of TPR1 (touch probe
1). (Pos units)
ro 0 Shows the rising edge position of TPR2 (touch probe
2). (Pos units)
ro 0 Shows the falling edge position of TPR2 (touch probe
2). (Pos units)
Touch probe2
TPR2
55 s
Rising: 2 s
Falling: 55 s