To continue the installation process of your Cobot Welder with OTC you will need to make a few connections to the welder from the robot and the feeder.
Table of Contents
Location of Welder
To start, the welder sits beside the system on the right-hand side as you are facing the system as shown below
There are 4 cables that you will be installing to connect the system for operation. The 4 cables are bundled together to make it easier to identify. Please follow along below for the steps to install the cables.
Welder Leads
You will need to connect the positive work cable from the front of the welder to the feeder, which is marked +++ near the Dinse connector. You will also need to attach the ground cable to the front of the welder, which is marked --- near the Dinse connector. Plug the two cables into the corresponding ports marked + and - on the welder as shown below. The two cables should lay straight from the table to the welder with NO coils in the ground or power cable.
Feeder Communication Cable
You will also need to connect the feeder communication cable to the front of the welder using the port marked with the O|O symbol, directly above the welder positive and negative cables as shown in the image below.
Ethernet Fieldbus Connection
The final connection that needs to be made is to connect the robot to the welder using the supplied ethernet cable. The robot end is already connected, only the welder ends need to be secured. This is a screw-in type, industrial ethernet cable so align the pins correctly and then you can screw the cable into place.
OTC Jog and Purge Button Box
In addition to the normal operator button box used for play, stop, etc there is a separate button box for controlling the jog and purge functions on the welder. Once the welder is connected as a field-bus-controlled unit the buttons on the front of the welder no longer function for inching, reversing, or purging.
Notice the Jog switch has two positions, one for forward inching, pointing to the right, and for reverse inching or retracting, pointing to the left. The purge is a momentary button. This box comes already installed to the system and is connected under the robot cabinet (shown below with a UR20 safety port in the foreground)
If you need to extend the cable you can always use a M12 5-pin industrial cable to accomplish this task. Unscrew the existing cable from under the robot cabinet, install the male end of the new cable to the robot controller, and then screw the new cable into the existing cable male end to extend the cable. Any industrial A-Coded, M12 5-pin cable will work such as this cable from Automation Direct.
OTC Accessories
There are a couple of accessories that are in the drawer in case you need them. The first is an extension cable if you choose to move the welder from the right hand side of the table to the left, this will daisy chain between the feeder and the welder to extend the reach of the cable
The second is the software that was installed on the OTC Power source at the factory in case you ever need to perform work on the welder. This is for the authorized service tech to use but you have it in case they need it. It is located in the drawer as well
