MV-45/40 tool change arm out of position

[claya]

Um.. You have the arm off. Yours is splined, there is no taper lock...... I wouldn't pound the shaft. My machine has a barrel cam, that rotates a cast claw shaped lever. The claw lever slides the shaft up and down. Looks like the barrel cam is stuck mid cycle, or the link is jammed. No way to describe how to fix this in words.

On My MV-JR, you have to take out the barrel cam to remove/replace the claw lever.

[underthetire]

OK, MV45 is totally a hydraulic ATC. There are no cams, motors or the like in that machine. Pounding on it will only break it. I don't think i've EVER had to re-align a MV45 arm in all my years. It's ALWAYS the hydraulic gear rack from the 60, 120 deg etc. There are ways to get it back, none require removing/pounding on stuff. You will break the rack if you continue to pound on it! It requires getting the arm between up and down and playing with solenoids just right to get things lined back up. I will usually always give ideas how to fix it, but you have brought out the hammer and i'm afraid what has happened already. Call in a professional !

[t_blake10]

I had this same problem on a MV 45 I was running about a year and a half ago. I don't recall having to pound on anything. After 2 days of trying to fix it I ended calling a service man who had it fixed in just a couple of hours.

[vfsi]

I have resolved the timing / position issue of my tool changer arm.
To fix it, I had to rotate the arm ONE rack tooth from the 60 degree rack to the 180 degree rack. This is easiest to do with two people, one manually operates the hydraulic valve that controls one of the racks, rotating the arm about one tooth (or as many as needed). The other person watches for the correct alignment of the arm. When aligned, the arm is manually shifted (using the hydraulic valve) to the other rack. I could do it again in 30 minutes after spending a month searching for the method to do it the first time.

The root of my problem is in the I/O board or wiring. The end of travel switches in the tool changer function correctly as measured with a voltmeter but the controller shows 2 I/O points that never turn off, (arm up, 180 rack at zero). I have traced the wires into the control cabinet and the signals there are correctly switching. I must have some Inputs on the board that have failed in the ON position. My guess anyway. Anybody have any insight.

[B Godard]

Ah yes. The old rack style tool changers on the old vertical Mori Seiki's. they are always a problem child. I personally have experienced this a couple of times myself. I cant explain every detail here on the forum but I know first you have to remove the guide/nut off of the top of the ATC shaft and then you'll have to manually poke the valves in the right sequence to get it to work. A couple of times I had to turn off hydraulics and bleed the 180 rotation valve so that i could force it into place and to line up on the right tooth of the rack. Dont forget to allways complete the manual step cycle with an M88. You wont see it move but you'll here the valves click. If you cant get it fixed then shoot me an email and I think that I could help you.

[underthetire]

Your arm most likely will not simply come loose and turn, like the rest of these guys seem to think it will. You have the early ATC. There is two hydraulic racks in that system, and basically it skipped a tooth on the racks. Its a ***** to get them back, you basically have to manually operate the up/down solenoid till you get the arm between the two racks, then you can move it back to position. Manually activate back to up position. Been doin those for years, and it can still take me 4+ hours of screwing around sometimes. Good luck.

[SPetach]

I have had to re-synchronise our MV-55 several times already. No removing the arm or hammering is needed. The problem is likely the solid state relay board driving the soleniods that is causing the synchronisation problem.

The important thing on the hydraulic tool changers is to know where in the sequnce the arm currently is.

Tool pot down
spindle orient
tool lock unclamp
tool arm +60 deg (spindle)
tool lock clamp
drawbar release
tool arm down
tool arm 180 deg
tool arm up
drawbar clamp
tool lock release
tool arm -60 deg (home)
tool pot up
tool arm 180 deg returns to 0 deg

Keeping the sequence in mind, the arm can be operated manually by the hydraulic valves located above the pump unit. There is a plate inside the door that indicates which valve does what.

If the gear has gotten out of synch with the rack, I will reset the other rack to its 0 position. The arm can only move down at the spindle position- do not force it down when in the home position.
If the arm is down, the easiest is to press E-stop to shut off the hydraulics, align the arm to the spindle position, use a hydraulic jack to lift the arm back up to the spindle, (remember to have reset the 60 deg rack at the +60 position), release E-stop to start the hydraulics then use the valve to return to home position. M88 at the end should finish and clear the cycle.

[Juan Jose]

I need help I have an alarm POWER OFF AT ATC CYCLE OR STEP and on the screen is active instruction LSK and won't let me make movements, already modify parameters 6006 and 7099 but won't let me run any instruction, help please I have a week stop the machine, what more can I do

[B Godard]

First we need to know what control is on your Machine. Mori Seiki built these machines with several different controllers. Sound like you have a Yasnac MX2 but i could be wrong. Also we need to know if your machine has the motor/cambox type ATC or if it has the hydraulic actuated rack. I believe since your machine is asking for a step cycle, it must be the hydraulic actuated rack. Thje old rack tool changers are a little bit of a pain to fix when they jump a tooth. Especially if you have never worked on it before. I'll see if I have a procedure to help you but first, I need to know the control type.

[Juan Jose]

Hello Thank you for your reply, well my machine is a Mori Seiki MV 45/40 Yasnac MX1, the machine was working and it was the energy when he returned, the energy arm ATC was out of position. Turn on the machine and presented the problem POWER OFF AT ATC CYCLE OR STEP and the operator display the instruction is LSK enabled the Leds ER3 turned on. We have now returned the arm ATC to its original position and we cannot reset the alarm and do not permit us to make some movement with commands we have more than a week with this problem, please help to restore this condition