Drag Chain Assembly

This section will guide the reader on how to properly assemble the LumenPNP v4 Drag Chain Assembly.

QC Harnesses

Before assembling the drag chain, QC the individual cable harnesses from the manufacturer.

• Head Harness
  • Labels are all correct
  • Colors on head side are correct
  • Z MOTOR, L MOTOR, and R MOTOR cables have inner conductors swapped on the head side only.
  • Z MOTOR, L MOTOR, and R MOTOR connectors skips positions 2 and 5 on the head side only.
  • All crimps are fully loaded
  • No loose conductors/Exposed wire
• X Gantry
  • X MOTOR connector has inner conductors swapped gantry side only.
  • X MOTOR connector skips positions 2 and 5 on the gantry side only.
  • Labels are all correct
  • All crimps are fully loaded
  • No loose conductors/Exposed wire

Prepare cable-splay

• Insert 2x M5-square-nut into cable-splay

  • Glue is not required even if the fit is loose

  

Assemble Drag Chain

1. Insert cable-splay into bij-jig after 2x M5-square-nut are inserted

   

2. Place 34-link-chain and 30-link-chain in drag-chain-jig with the flat side resting on the red area of the jig

   

3. Screw the chains in place

   

4. Pop open the drag chain tabs with a screwdriver

   

5. Open all the tabs to make assembly easier

   

6. Insert x-harness-cable into drag-chain-jig

   

   • Ensure that the end photographed below is on the left side of the jig

     

7. Insert top-camera-cable and feed through drag-chain-jig

   

8. Feed top-camera-cable around this piece of drag-chain-jig as shown below and pull taut

   

9. Take pneumatic-tubing (one of each color) and insert into the adapters on drag-chain-jig

   

10. Feed through drag-chain-jig and pull taut. Ensure the two pneumatic-tubing tubes don't cross over each other when feeding around drag-chain-jig

    

11. Insert pneumatic-tubing in opposite order on the bottom end of drag-chain-jig

    

12. Prepare head-harness and ensure that mobo side of head-harness has proper spacing. Inspect the cables for any loose crimps, reworking as needed, before continuing

    

13. Pull head-harness taut

    

14. With the thinner cable facing you, feed head-harness through drag-chain-jig until the first ring of tape on the toolhead side of head-harness is at the beginning of 34-link-chain

    

15. Pull head-harness all the way through and ensure the cable is taut

    

16. Close all of the tabs on 34-link-chain and 30-link-chain

    

17. Use presser-tool to secure the tabs

    

18. Disconnect pneumatic-tubing and the usb side of top-head-cam.

    

19. Unscrew 34-link-chain and 30-link-chain from drag-chain-jig

    

20. Remove 34-link-chain from drag-chain-jig first. Bring it to the bottom side of 30-link-chain while keeping it face up

    

21. Remove 30-link-chain from drag-chain-jig. Flip both chains upside down in preperation for placement into the bij-jig

    

22. Insert both chains into bij-jig

    

23. Secure chains into bij-jig with m5x16-flat-head. Use high torque

    

24. Raise the rail attached to bij-jig and insert pneumatic-tubing into color-coded slots

    

25. Zip tie the tubing and cables into the grooves of cable-splay

    

26. Feed head-harness cables underneath the cables zip tied to cable-splay

    

27. Seperate top-light-cable from z-limit-cables

    

28. Pull top-light-cable through to line marked on the back side of bij-jig

    

29. Do the same for top-camera-cable

    

30. Zip tie top-light-cable and top-camera-cable in place

    

31. Pull head-harness cables taut. The cables should reach to or beyond the sticker on bij-jig

    

32. Bundle all cables and tubing together and place a rubber band to keep them together

    

33. Do the same for the cables at the top, making sure not to bend pneumatic-tubing

    

OQC Checks

• Inspect the cable-splay side of drag-chain and confirm the following cables are present and installed in the correct direction

  • LM cable: 6-pin connector with a redLM label
  • RM cable: 6-pin connector with a blue RM label

• Confirm the following vacuum tubes are present at both ends:

  • Red 4mm-pneumatic-tubing
  • Blue 4mm-pneumatic-tubing

• Confirm no vacuum tubes are pinched closed by the rubber banding

• Confirm 3x zip-tie used in cable-splay are trimmed flush and present
• Confirm presence of top-camera-cable

• Confirm presence of x-harness and double check that x-harness has the correct orientation

  

If all checks pass, place the completed drag-chain into a yellow NEEDS QC bin found on the pack-out shelf while it awaits review