Replaced Z-Slider and cables - Z Axis Shuttering

1

Need assistance troubleshooting BB (v1.6.6) Pro Journeyman, 80mm PwnCNC spindle. We had an unfortunate learning experience when laser is left unattended. Long story short, a quick restroom break and snack resulted in a fire. Main damage was too laser, z-slider/motor, and drag chain cabling. Replaced all today with new parts and cables.

X & Y and the Spindle are operating normally. However, the new z-slider and motor will not home. If try to jog, it just shutters - see attached vids. Have confirmed wiring connections are correct and Motor 3 config for Z-20. When powered off, I can move the Z up/down -feels normal.

I isolated the z-axis with the x cable to test, same result on Z, though X works normally with same cable. I don’t believe the issue is in the cables. I am at a loss on further troubleshooting steps.

Any advice would be greatly appreciated.

2

Check the DIP pin settings
Could be one is in the wrong position

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UPDATE:

I have a new set of cables, still in plastic. Used those to bypass new drag chain cables.

1 - Ran new cables directly from M3 to Z axis motor - same issue.
2 - Ran new cables from M3 directly to X axis motor - no issue, works normally. I could move the X axis left/right using the Z-axis up/down controls.
3 - Ran new cables from M1 to Z axis motor - same issue.

I have bee unable to locate info on physical DIP pins. Did reconfirm config for Z-20/M3 reconciles to setting 1F states in their docs.

I have always noticed a slight high pitched noise when the motors are running. However, that sound seems to be louder and higher pitched on the new Z-20 slider motor. Thinking the new z-slider motor is faulty?? I just don’t feel like this is a cable/connection issue.

4

You are bypassing the “middle” cable with the required cross over, which is giving you the symptoms you see.
See this faq for clarification Support: How to determine if a wire or motor is damaged

If you are using aftermarket drag chains and aftermarket wiring, I’d replace those with our official drag chain kit with preinstalled wiring.

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5

DIP pins blue switches are located under the plastic Motor cover. You need to verify that the settings are configured correctly for your machine.

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He has a open loop controller (bb) , so dip switch settings does not apply in his case.

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Thank you for the response. All cabling/drag chains I am using are from 1F. Which, prior to the fire, I was using 1F cables/drag chains. No curly cable supplied by 1F. Is that expected? I apologize for the repeated questions. I obviously am missing something here. There was no curly z-cable prior to the fire. Is there another cable I need for the BB that is not included in the drag chain pack up?

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Ok, found the original curly cable and plugged it in between the new cables that came in the 1F drag chain and the z-motor. Issue resolved, the z-axis works as expected.

Appears the cross-over cable in the drag chain is defective?

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