ABB DressPack IRB 6640 Product Manual page 300

4 Repair
4.2.15 Adjusting tension arm unit
Continued
Tension is optimized for normal length of upper arm harness working vertically.
Required equipment
Equipment
Standard tool kit
DressPack/SpotPack
Wrench 27 mm with exten-
ded shaft
Adjustment values
At delivery all tension arm are pre-tensioned 3/4 of a turn.
Spring force must be adjusted to fit valid cycle. Approximate values:
Adjusting tension arm unit
The procedure below details how to adjust the tension arm unit spring.
Loosening the spring
1
2
Continues on next page
300
• The arm of the tension unit shall "float" a little when the robot is moving.
Short upper arm harness for working horizontally may need less tension.
Long upper arm harness on shelf mounted robots may need a higher tension.
• Spot welding ~ ¾ turn
• Material Handling~ ½ - ¾ turn
Action
DANGER
Turn off all:
• electric power supply
• hydraulic pressure supply
• air pressure supply
to the robot, before entering the robot working
area.
WARNING
In order to avoid accidents place the robot in
a service position (upper arm slightly upwards)
with the tension arm resting against the
damper.
© Copyright 2007-2018 ABB. All rights reserved.
Note
The contents are defined in section
DressPack/SpotPack on page
To manage holding the spring force properly during adjust-
ment, the wrench needs to have an extended shaft (approx-
imately 0.5 m).
Note
xx0500001503
Product manual - DressPack/SpotPack IRB 6640
Toolkits,
335.
A Upper screw M12
B Tension arm
C Damper
3HAC028638-001 Revision: K