HS50_advance_level 2 - 第280页
07/2002 Editio n Student G uide HS -50 Advanc ed II 9 Z-Axis 20 3LFNXS&\FOHZ LWK VSHFLDO PRGHV The spec ial Z-ax is mod es "ear ly va cuum" and "slo w start upwards " exp laind her …
Student Guide HS-50 Advanced II 07/2002 Edition
9 Z-Axis
19
9
07/2002 Edition Student Guide HS-50 Advanced II
9 Z-Axis
20
3LFNXS&\FOHZLWKVSHFLDOPRGHV
The special Z-axis modes "early vacuum" and "slow start upwards" explaind here in combination.
This combined usage could be programmed - but for the placement process it make less sense.
The slow start upwards (after pick up) is used with less than 100% acceleration of Z-Axis.
The slow start upwards take typically 20 ms longer!
1) The start of the pick up cycle is like the standard pick up cycle.
2) The last end signal from the X- Y- or Star axis and the OK-message "feeder ready" start the Z-
axis movement downward.
3) The upper light barrier switch the valve drive for the vacuum on when in the GF-Editor the but-
ton " Early Vacuum" is activeted. During the travel down timevacuum came to the open top of the
nozzle. At tiny nozzles you have a relatively high vacuum to suck the component on the nozzle.
Unfortunately the nozzle is open to suck dust from the environment (so not recomended for large
nozzles).
4) The slope at the upper light barrier enable the lower light barrier function. (see standard mode
diagram before
5) The end signal of the valve drive and the Z-axis on lower position (light barrier) start the Z- axis
with minimum speed for a 1 mm distance, if you used the right travel profil in the GF-Editor.
6) At this time of about 20 ms the vacuum between component and nozzle increase to the maxi-
mum. Than the Z-axis move on with standard speed profile (acceleration).
7) The signal of the upper light barrier switch off the signal of the lower light barrier and start the-
vacuum check after pick up and X- Y- movement.
8) The endsignal of the Z-axis (at 0-position) start the Star- axis.
Student Guide HS-50 Advanced II 07/2002 Edition
9 Z-Axis
21