Hi Everybody,
I hope y'all are still there. I didn't realize it's been almost a week since my last post. Anyway here is the latest it's been a real frustrating week Machine is still having the same problem. Toolcat I tried your suggestion last Saturday of letting the machine "warm up" before I hit the power on button and it didn't seem to work.I let the machine sit with the power on at the main breaker for 30 minutes and it still didn't power up when I pushed the power on button. At this point I flipped the breaker off and then right back on pressed the power on button control didn't come on but I heard a faint click which turned out to be coming from the pd14c power supply. cwtoyota could this be the click you heard on your machine? At this point I pressed the power on at the power supply and the fans beneath the boards came on but no lights on the boards or the red indicator light on the power supply came on. I checked the voltage at this time and I had 100vac going to the power supply but nothing going out unless I pressed the power on button at the power supply and then I had 100vac going out as well let the button go and nothing going out. I turned the machine off and pulled the power supply out of the machine and took the cover off to see I saw anything out of the ordinary like a bad fuse or bulging capacitor but everything looked good. I checked the fuse and it was good as well. I decided what the hell I put the power supply back in the machine flipped the main breaker on and the damn thing powered up at the control with no problem!!! Since it was up and running I checked the voltage at the power supply check points(?) and this is what I got +5v=5.00, +12v=12.04, -12v=-12.02, +24v=24.00. everything where it should be. Machine ran great all day this all happened last Saturday. Monday morning machine wouldn't start at the control again. I went straight to the PD14C powersupply and pushed the power on button and the machine came on as if I had turned it on at the control panel. That's the first time that's ever happened . Machine ran great all day. This past Wednesday same crap different day wouldn't come on, I repeated my procedure I did Monday by pushing the power on button at the power supply and not only did it not come on it was doing the same thing it did the previous Saturday morning before I pulled it out of the machine. Needless to say I was pretty aggravated with the whole situation by then so I flipped the machine and breaker off and worked on other things in the shop. Bear with me we are almost to the end of this superlong post. After I thought about it awhile I decided to try something different on the startup of the machine just to see if it worked. I started to flip the main breaker off and then right back on if the machine wouldn't power up at the control and for the first time since the problem started I noticed a pattern. First flip off/on nothing control wouldn't power up. Second flip off/on click at the power supply but no turn on at the control, Third flip off/on this is where it gets weird the monitor would come on ( the monitor spec screen not the actual mazak control screen) and the Rapid ,spindle and feed led's came on as I pressed the power up button and I also found out I had 100vac at the control as long as I kept pressing the power on button as soon as I let go everything quit working. It was if it was getting partial power. Fourth flip off/on of the main breaker press power on and the machine starts up. I've managed to get this pattern to repeat a couple of times. I know this isn't good for the machine but I'm looking for consistency somewhere to start to trace the problem. Maybe it's coincidence maybe not I'll admit I'm reaching now. BobW I think I'm going to take another look at the transformer . Maybe I missed a power feed that goes into the cabinet that's not working. Maybe it's a bad board FX702 and FX727 are the boards that control the control panel.I would really appreciate any comments/thoughts y'all have. I also forgot to mention that I called a Mazak Tech who's been working on mazaks for years to come by and look at the machine. He was very nice and helpful over the phone but he let me know that he didn't work on that vintage of Mazaks. I was afraid of that. Finally I do apologize for such a long post and maybe some of the information clutters the post however it's my intent to get as much information out as I can in hopes that somebody can point me in the right direction
Thanks
Brandon
Thanks
Brandon