HAAS EC 1600 4th @#&!*

[Maechler]

Wondering how many EC 1600 are out there with a fourth in the table that wont hold better than .008 in 28". Mine is brand new,, has not even cut a chip yet and I cant get it to zero the t slots everytime it is powered up.

[Machineit]

A "fourth in the table and zero the t-slots?"

What is it that you are talking about? Can you explain what's happening?

Mike

[Maechler]

Machine has a rotary in the table. T-slots on the rotary will not indicate straight at power up. rotary T-slots are like those on the rest of the table. My fixuring sets up off the T-slots and cuts at 90 and 180. This thing has been a pain in the butt for two weeks now.

[Machineit]

When you power up, the 4th axis will zero itself from its internal home switch. That does not mean that the slots will necessarily be straight up. Have you zeroed your 4th axis in your offsets. It has to be set just like X, Y and Z. Turn it until your slots are where you want them and then set your A axis offset.

Mike

[Maechler]

There is a parameter to set the rotary straight, we have five other verticals with rotarys and a EC 500 that are all straight using that parameter. The Haas tech has been here for two weeks, thought he had it right yesterday, several times he would power it down, restart it and it would be back to zero. When he left I spent the rest of the day setting up the fixuring, making sure that it was in line with the rotary and today the whole thing is off again. We have not spent 250K to have to patch this thing to make it work. it should at power up go to the switch like you said and go back to zero every time, the part that is run on it cost us over 5k so there is no room for error. I have a 28 year old Toshiba that this machine is to replace that holds better tolorance than the Haas, just that it is getting hard to find parts for it.

[Kool Parts]

I have never tried to set a 4th with a parameter. Wouldn't it make more sense to just set A 0.0 in each program rather than at first start up?
Gary

[NWSERVICEGUY]

Well before you get all worked up there are a couple of things that you can try. 1st you can go to the A axis parameters and adjust the grid offset. Now usually this can only take up a little bit of error. In the A axis parameters there is also a parameter called (tool change offset). What you can do is go into debug after hand jogging your A axis to what you feel is nice and straight and putting the actual position found in the pos-raw-data page for A axis (without the decimal) into the tool change offset parameter for a axis. I had to do this for another customer years ago since he did not feel that he should have to put a work offset for his fourth if he wanted it to be parallel with x. To each his own. This parameter for tool change offset works just like z axis parameter tool change offset. After you do a zero return it will rotate to the correct position.

[Maechler]

Before I get all worked up? It has been two weeks that the local service tech has been working on this! Now a factory HAAS man is coming in. I have several HAAS verticals that all have been setup the way you said. Last Thursday the local tech found that the rotary was beening controlled my a board instead of the scale and that a backlash was causing the problem.( he said and I guess you know what he is talking about) He did several power downs and restarts and everything worked fine. I did the same, still everything looked good. I reinstalled my figturing, checked the rotary slots to fixture dowels at A0, A90 and A180. Everything is good, I'm happy after two weeks of #@*!. Come in the next morning and check again....guess what......Dont get worked up! $250,000.00 should be right when it gets here..not after weeks of working on it after it gets here. Even after it gets fixed (if it does) how long it will take before i can trust it is a huge question at this point.

[haastec]

Sorry to hear of all your troubles. Hopefully the factory tech will give you much greater satisfaction. The ones they send in are usually experienced at the assembly level and typically know their stuff well.

Post back after the visit and give an update.

Good luck!

[Maechler]

Factory tech said there is almost .002 of backlash and that is just the way is, said I would have to write my programs to go past postion and then come back. SHAME ON HAAS!!!!! If they can't build a machine any better than that, they just need to shut the doors!!! Its embarrassing!!!

[Delw]

They aint going to fix it? or did they just tell you how use us it till they fix it? nothing wrong with the latter

[Maechler]

All I'll say is that they are still here working on it. I should not have to PROGRAM backlash out of a new machine.