Walther prazision 91489, Working Instruction

Page: 37 / 191

Working instruction
english
typ 91489
Works on malfunction
and damages
37
10 Works on malfunction and damages
10.1 General safety instructions
In case of malfunction and damages (e.g. after a crash) the tool changer is to be
returned into starting position (tool to tool parking station) and stopped.
Caution!
Carry out function test in the area of the tool parking station
(lifted approx. 3 mm) only!
10.2 Cause of trouble and assessment of damage
If a malfunction occurs without coming to a crash before, the fault finding is to
start as follows:
1. Is the voltage supply guaranteed? (Emergency shutdown?)
2. Is the compressed air supply guaranteed?
3. Can the valves/valve be reversed (faulty magnet/valve)?
4. Is locking cylinder pressurized (faulty line)?
5. Is the control sequence blocked due to a missing signal (faulty proximity switch)?
6. Is there a malfunction at the locking mechanism?
7. Commissioning after faulty clearance only!
Check and assessment of damage after a crash:
All checks have immediately to be carried out – as described in item 9.2!
If the tool changer with its pneumatic cylinder cannot be separated any longer separation of the
tool side is effected by means of the emergency separation facility (see item 10.4).
Then the tool changer is to be taken off from the robot to repair pull-in and
locking mechanism (see item 7.1).
If the fluidic elements and electro plugs do not show any damages they need not to be disman-
tled but removed out of the tool changer plate of the robot side only
(see items 10.5 and 10.6).
The repair of the pull-in and locking mechanics is exclusively to be carried out at the manufac-
turer.
10.3 Central cylinder cover fastening Fehler! Textmarke nicht definiert.
The cylinder cover limits the stroke of the piston.
Due to loose fastening screw (item 16) (DIN 912 – M 10x55) caused by mounting error
or crash the piston extends too much which may lead to a falling out of the balls.
This will be prevented by an assembly carried out to the regulations:
- screw locking Loctite 242
- torque = 30 Nm