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IndustryArena Forum > MetalWorking Machines > Dyna Mechtronics > Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead
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  1. #13
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    MrMetric,

    Sorry for the delay in reply. It's been a busy year.

    Just read you post. Sounds to me like one of the Y limit switches is stuck. That's why the Y axis moves only in one direction. Spray some WD-40 on them and make sure you hear them "click", I hope after 2 months you figured that out on your own.

  2. #14
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    Well, as luck would have it, I didn't get the machine until last weekend. However, I did have the previous owner go over some things about 1.5 months ago. He was familiar with the problem and it was that the machine had been turned off while still on the limit switch. I knew it was on the switch (not stuck) but normally you can back it off the switch (not advance), but apparently the PLC wasn't setup for that. So, the only solution was to physically disassemble the switch plate so the switch could be deselected. Frankly, this seemed rather draconian to me and I've got a hunch that there is a better solution, but I was grateful for his help (plus it was still his machine at that point) so I just listened and watched.

    The machine is actually cleaning up really well. It was just dirty from not being used. I'm sourcing and replacing a new fan for the spindle now and have removed the enclosure (can't fit it in my garage for now). I did run into one stupid thing. I'm replacing broken switches and part of that was to rework the (un)clamp switches. I'm putting silicon covers on them. Anyhow, I took photos of the wiring, but the darned photos got corrupted. I then looked in the manuals, which are sadly pathetic. Dyna documented some stuff well and other stuff is flat out missing (nice to know the voltage but no mention of the current requirements, for instance). The wiring of the small switch harness between the connector and the two switches isn't documented. Soooo... Would it be possible for you to take your plate off and either shoot me a picture or send some descriptive text (color to connector X of unclamp switch, etc). There are only 6 wires, but I do want to get them in the right spot! Thanks.

    Photos when I get a chance.

  3. #15
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    Attached Photos of wiring of Clamp/ Unclamp switches inside front plate of head.

    I never had the Y axis thing happen to me, and I shut my machine down with the Y axis in the full Y- direction. I would still check to make sure the switches are not sticking.
    Attached Files Attached Files

  4. #16
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    Thanks.

    I powered the machine up for the first time today. I'm running off a Phase Perfect phase converter, which gives good power. I wasn't cutting anything, only jogging around and such. I had a stuck tool in the carousel, so I had to turn power off. After that, I get the following errors on power up:

    S04 AMP. CONNECT OFF
    Y03 AMP. UNEQUIPPED

    I don't see any LEDs lit on the spindle amp. The Z axis simply displays 56. And the X/Y amp displays a rotating message of:

    56 -> F1 -> F2 -> back to 56

    I've really not done much checking, in part because I'm kind of bummed. Hopefully there is an easy fix? All of the breakers are ON (none are tripped).

  5. #17
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    I run mine with a 5HP Roto-Phase, phase converter. I have found that, that would be the minimum size phase converter, as the machine is very voltage sensitive. If I turn on, or off another machine while the Dyna machine is on... It kicks right off. So I end only running the Dyna, with nothing else powered up.
    So, I would say, power EVERYTHING off. All the way from the breaker box, and start over from scratch.

    Good Luck!

    These machines can really test your patience sometimes.

    Bill K

  6. #18
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    I was just coming back in to post that after giving myself some sulking time, , I went back and found the problem very quickly. I use twist lock plugs and the one I installed for this project is temporary. It appears as though it will be *very* temporary.... It is especially hard to get in all the way and apparently it wasn't fully seated. I found it very quickly when I measured my voltage on the inputs and they were *clearly* not all connected. So, this was a simple brownout situation. Now all the amps are working properly and I can home the machine properly.

    Haven't tried the spindle yet... I don't know the Meldas control (or G-code for a mill, actually), so I need to figure that out. Should work though. Tool was stuck in the spindle but I got that out. The previous owner had left one in there for about a year.

  7. #19
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    Well, Good to hear that you found your problem. Also good thing you got that tool out before you tried a tool change, 'cause the first thing a Dyna does for a tool change is DROP whatever is in the spindle, before it picks up the next tool. I can't tell you how many times I have stabbed my workpiece with a tool dropping from the spindle. Good thing nobody was watching. <<< joke.

    Too make the spindle turn... Go to MDI... Type in: S1000 M03 Press cycle start. Spindle should start. M03 = Spindle Clockwise M05 = Spindle Stop M08 = coolant ON M09 = Coolant OFF Before you give a Spindle command, you have to give it a speed. hence S1000. That means 1000 RPM.

    Sorry to be so basic if you already know this stuff. Hope your spindle works OK.

    Again.... Good Luck

  8. #20
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    Basic is fine. It keeps me from having to look things up while I'm really just running through the paces of checking things. I've got a few things of note:

    First, the lights don't work on the clamp/unclamp buttons. I know the problem but not the solution. The common wire for the lights is not there. Do you feel like taking off four screws for that plate and snapping a picture or just providing descriptive text? I'm curious what pins in the connector go to which posts on the switches; I'd say color of wire, but I don't know if Dyna was consistent there.

    Second, I'm curious if your Y axis allows you to back off if you travel too far. I'm thinking the parameters aren't right or something. On the X axis, you can always back off from an over travel. On the Y, the only solution is to physically disassemble the limit switch assembly. And, I've noticed that even after you home the axis, you can then move the Y to the positive limit (table near operator) and it will hit the switch (and then require the physical (temporary) removal of the switch. That isn't right. The other axis "hit" the limit through software before the switch plunger engages (after homing), but not the Y. In fact, there is one other strange thing that I've noted on the Y that was there when I was looking at the machine with the previous owner.... The Y had been moved to the negative limit and the machine turned off. When turned on, the machine correctly faulted with the limit error, however, you couldn't use the wheel (or jog) to back off the limit (noted above), BUT you could use the wheel to move *further* into the error! That is just strange. Of course, it would fault again then slightly back off that fault, but not enough that it would reset the plunger. It is almost as though the limits are incorrectly setup (wrong position) for the purposes of backing off. I haven't checked the Z axis yet, but the X works as I would expect..... So, does your Y have anything funny in the way it operates?

    Third: The Dyna manuals are a little surprising at how poor they are. Measurements and even power requirements are not well documented (30A 220/240, 3 phase for those reading this), etc. One thing I also can't find is the type of oil recommended for use. I'm assuming Vactra #2 is fine for the way oil, but I thought I'd check. What are others using?

    Thanks!

  9. #21
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    Re: Dyna Myte 4400M with Meldas M3 Control. I think the battery is dead

    The problem with the Y axis limit is solved... I noticed that one of the Omron limit switches was broken and had been jerry rigged with some wire around the threads. It was a creative fix, but I located three new switches for $25 so I figured I'd fix it. Anyhow, while in there, it occurred to me that whoever wrapped that switch may have screwed up the order. So I did a quick check.... Sure enough, the max and min were reversed. Both functioned as limit stops, but the ability to back off the limit was working against the operator. You could only advance *further* into the over travel instead of correcting it. So, I swapped the two limit switches (the third is for the origin reference operation) and Voila! Everything works again.

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