Machine Tracking Error (alarm code 10)

Titan 25T CNC Press Brake
1

Hi All,

Fired up to make a new bend this morning and homed the machine. The last time the machine was shut down (week ago), it was in the lowered position from previous bend program. Point being the rams needed to go up to home. As the rams were going up, the actual steel plate that holds the punches was not moving initially seemingly the right side was hanging up and then bam, the plate slammed up to the rams and moved consistently to home from there, successfully. I though, ok, that was weird, and sucks, thinking what else on this thing am I going to have to play mechanic on now. Since it homed correctly, and seemed fine, I went ahead to run my new bend - about 32” of 10 gauge of Hot Rolled P&O for a 90, using standard 30 degree punches and 26MM Acute dies.

Welp, the part starts to bend normally, and then there is a not very loud clunk ish noise like if you were coming to a stop in a car and the suspension was loose and the final stop is a clunk. The machine stops, waits about 10 seconds and throws the Alarm Code 10. Hmm… Re-home and when right near the top, it throws the anti bind code. Go behind and center the anti bind to clear, re-home - all seems good, nothing appearing bent or anything, and this all is a bit uneventful - meaning nothing crazy bad is going on. Tried to run again, same thing. Re-homed, tried manual mode to watch closer, same thing - alarm code 10.

Is this a bleed hydraulics thing? Any ideas on why the plate that hold the punches was initially “stuck” down? The machine is new, in the middle of making friends with it, and only has like 8 bends on it. All previous bends went well as they should. I am pretty meticulous, but a little stumped as to what to do next outside bleed hydraulics as the issue doesn’t happen until it starts to see the beginnings of some pressure - part might have about 10 degree bend max.

2

That sounds like your ram was catching on something. I would need to see some pictures. Get in contact with me at support@langmuirsystems.com with pictures of your punch/die settup, and the front and back of your machine. This could also potentially be a bad encoder? Some pictures of your live report section would help as well. I haven’t seen that sort of ram hanging before and the more information you can send me, the better.

For the second part after that homing strangeness, that sounds like it is potentially just an under-tuned Pressure Relief Valve Calibration thing. One of your valves blew early and it forced the ram out of alignment. You just need to increase the calibration of your Pressure Relief Valves and

There are three parts to the PRV (Pressure Relief Valve):

  • The upper valve body - a part that can rotate and the position of which determines the pressure calibration.

  • The Jam nut - a nut that tightens upwards and holds the upper valve body in its calibrated position.

  • The base 1" nut that is used to screw the part into the pump.

To tune up your PRV, you will want to loosen the jam nut downwards slightly, turn the upper valve body about 90 degrees tighter to the right, and then tighten the jam nut upwards to secure the assembly again.

If your upper valve body and base 1" do not have a sharpie mark showing their default alignment, I would add one before working to tighten it up. That way you can keep track of how far you have tightened the valve past the pre-calibrated position. DO NOT TUNE YOUR VALVE MORE THAN 180 DEGREES PAST THE PRE-CALIBRATED VALUE WITHOUT CONTACTING THE SUPPORT STAFF FIRST.

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You will also want to bleed your machine before you run another high-tonnage bend like that. https://www.langmuirsystems.com/titan25t/assembly#titan25t-manual-19

On your next bends, please take a video of the live report window so we can watch what is happening to the tonnage and ram positions. Especially on your first 90 degree tuneup. That way if your first 90 degree tuneup fails, you will be able to keep track of how much the pressure limit was raised by that 90 degree twist. You will generally want to make a 20 degree twist for each ton you are short.

Lowering the bend speed to 1 IPM for an extremely high tonnage bend will help, especially on the initial calibration after your first PRV adjustment. It will make spotting the high tonnage point on your post-calibration bend easier. It will also reduce the force required to make the bend.

To fix your anti-bind system you can use this useful guide:

Anti-Bind Troubleshooting Guide.pdf (1.7 MB)