Universal Robots UR3 Service Manual page 34

For details and photos please see:
1. Shut down the controller.
2. Remove black flexible flat ring with a small flathead screwdriver or similar tool and pull it
back over joint housing away from it's original position.
3. Slide back the black Teflon ring. Screws become visible. Loosen the screws.
4. Pull the Base mounting bracket and Base joint gently apart.
5. Disconnect wires from the EMC filter in the Base mounting bracket.
Assemble
For details and photos please see:
WARNING
Remove Loctite residue inform screw holes using an M3 (M4 for Size 2) tap tool
for threads before assembling the joint to get the correct torque on the new
screws.
Always use new pre-coated screws where possible. If you must assemble with
old screws carefully clean the screws and apply Loctite 243 to the threads before
assembly.
1. Replace Base mounting bracket and reconnect wires to the EMC filter.
Twist the communication cable 1.5 to 2 full rounds before it is connected to reduce
electrical noise in the system.
1 x red wire
1 x black wire
White and black
2. Orientate the joint and Base mounting bracket according to the alignment marks and gently
push them together.
UR3
General Guidance to Separate Joint from Counterpart
General Guidance to Separate Joint from Counterpart
= 48V DC
= GND
= bus connector
28
5. Service and Replacement of Parts
Service Manual