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How-to’s
Section 5-1
313
5-1-6-9 Example: Starting a slave axis in precise position of a master axis
The picture shows a flying shear cutting the "head" of wood tables. When the
wood comes, the edge of the wood is detected by the photocell and, at the
exact moment, the movement of the flying shear starts to be synchronized with
the right position on the wood.
If the movement is started by the program, upon detecting a signal from the
photocell, there is always at least one
SERVO_PERIOD
of time of uncertainty.
Instead, the movement is started using the
MOVELINK
command with
link_option
=1, which means that the link to the master axis starts when the
registration event occurs on link (master) axis.
The corresponding program sequence is:
REGIST(2) AXIS(master)
MOVELINK(dst,lnk_dst,lnk_acc,lnk_dec,master,1) AXIS(slave)
For more information on the
MOVELINK
command and the
link_option
argument, refer to section 4-2-162.
The picture shows how the position of the slave axis is corrected using the
registration event on the master axis to start the movement of the slave axis.
The influence of
SERVO_PERIOD
and the fact that the registration event can
happen at any time inside the
SERVO_PERIOD
is completely eliminated.
E
E
Master axis
Slave axis
Flying shear
Transporting belt
Master Speed
Slave Speed
Servo Period
Correction in the slave
according to the latch.
Extra position the first
cycle is equal to the
“lost” position
Registration input signal
Содержание trajexia CJ1W-MCH72
Страница 69: ...Specifications Section 2 4 58...
Страница 83: ...FINS commands Section 3 4 72...
Страница 147: ...All BASIC commands Section 4 2 136 AXIS 1 AXIS 0...
Страница 277: ...All BASIC commands Section 4 2 266...
Страница 278: ...267 SECTION 5 Examples This chapter gives 2 categories of examples and tips How to s Practical examples...
Страница 371: ...360 Index...
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