SP25 carriage gear adjustment

I have a problem with the large power carriage motor gear touching the edge of the carriage. Not sure I’m using the correct terminology but I have attached a photo. I had this problem once before and was able to correct it but now I can’t remember what I did.  (I took off the cap on the gear to take a look inside which is why it is missing in the photo).

How do I make an adjustment to back the gear away? Anyone know? TIA

7 thoughts on “SP25 carriage gear adjustment

  1. The Arm NYC - November 29, 2021

    I see now that you stated that you removed the parts I mention in my last reply.

    Find the allen head set screw in the F-971 clutch tensioning collar and loosen it.

    Use a pin or the end of a small allen wrench to back off that collar in the direction of the motor. It is okay to go nice and far.

    Put back the parts you had removed on the end of the clutch and make sure it is well tightened and the clutch is seated correctly.

    Re-tension the clutch collar. You want it to be set tight enough that it will go without slipping over a form, but it should slip if it hits something over type high.


  2. The Arm NYC - November 29, 2021

    You appear to be missing the flat plate and allen head screw that compresses the unit and keeps it in place. F-921 in Paul’s schematic there.


  3. LisaKesler - November 22, 2021

    Ahhhh, yes! That’s got to be it. I’ll give it a try in the morning.

  4. Paul Moxon, Moderator - November 22, 2021

    See the threaded hole on the mounting bracket and back out the set screw. There may be another one on the opposite side. You should then be able to push the gear and clutch toward the motor. Retighten the set screw.

  5. LisaKesler - November 22, 2021

    Seems like the clutch and gear have the right space between them. It looks like there’s way to much space between the collar and the motor. How do I narrow that gap?

  6. LisaKesler - November 22, 2021

    Thanks, Paul! I am heading to the print shop this afternoon so I will take a look then. Fingers crossed.

  7. Paul Moxon, Moderator - November 22, 2021

    Is there a screw in the cap? If so, check that the threads are not stripped.
    Is the gap between the gear and the clutch greater than in the attached image? You may be able to tap the gear toward the clutch and retighten.

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