[Chalkboard247]

Hi all! I've been tasked at work with setting up four Okuma Captain L370M lathes. Programming with NX, built out a great post, ran first part family and parts FAL'd fantastic!

I'm now trying to run the next part family size (part is larger OD) and I'm getting a 1741 chuck unclamp error. Per an error manual I found online, the machine thinks my jaws are unclamped. In reality, I'm clamped at ~250psi and the part's rock solid.

I've read in other posts here that I most likely need to calibrate the chuck clamping proximity sensors, but nobody has explained where they are located or how to do it. I have no machine manuals, these were transferred from a plant in TX. Does anyone know where these proximity switches are located on a Captain L370M?

Thanks in advance for your help!

[OkumaWiz]

They are on the rear of you actuator opposite to your chuck. Only one can be on at a time.

Best regards,

[Chalkboard247]

Where is this actuator located? Sorry for being such a n00b with this, just don't know where this actuator is!

[OkumaWiz]

Look thru the center hole of your chuck. Where the hole comes out on the opposite end is your actuator. There should be a door that opens up for you to make the adjustment on the left end of your machine.

[Chalkboard247]

Found them! Perfect, thanks for your help with this. Looks like two sensors with slide-plates and tall wing-nuts that are made for adjustment.

Thanks again!