Regardless, it is ALWAYS either right before or right after grabbing the toolholder (withing 2-4 inches of movement at the end of the arm). That has now turned into hanging out either there, or after grabbing the tool and cycling back. It initially hung up about 2-3 inches above the holder when it would first cycle down to grab it. Is the brake the hydraulic pistoncam follower assembly on top of the ATC casting Husker: We havent tried cycling without a toolholder in auto, so Im unsure as to how it will act. I guess Im also not 100 what would be considered the brake in the ATC. I know we have a few of those sitting around and they are easy and quick to swap out. The pot down switch sounds like it would be a good next option to check. Initially it was occurring about 2-3 inches before it touched the tool. Will it cycle without a toolholder in auto If so, where does it hang up when it does have a holder. Im sure you have noticed how much slower it cycles manually.) just my 2cents. That being said, it may be a drawbar issue, not releasing the tool completely and the arm fighting it, which would explain why it works in manual mode. The only alarm it throws is EX0159 (ATC ARM H.P. My techs and I are pretty much all out of ideas on where to look next. So far weve tested, checked, and found that all the following are good: -Motor -Piston Assembly on top with cam follower -Both sensors -Contactor in electrical cabinet -Hydraulic solenoid block that controls tool clampunclamp during ATC Cycle -Cam followers inside the ATC and all associated roller bearings -Gears all look good inside ATC. Manual tool changes (TM6 method) work fine as well as using the ATC MANUAL OPERATION in the Custom menu. This usually happens anywhere from the first tool change in the program, to after 4 hours of production.

It will begin the cycle, get partway through, then just stop and bounce a bit. Intermittently it will not complete the ATC cycle, not always on the same tools.

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