That Guy
Plastic
- Joined
- Mar 3, 2014
- Location
- Washington State
I've had this TM2 for almost a year now and never had any issues with it. But lately I've been having really bad chatter when cutting in one direction on the x axis. When cutting in any of the other three directions there is no issue, but when it starts the other way the spindle load will jump 30%-60% and the machine sounds like its about to rip itself apart. See the attached image for a description. Also when interpolating a circle I can see the transition marks at the 3, 6, 9, and 12 o'clock positions that were not there before, with the mark at the 6 being the worst. I'll admit that the transition marks are very small and I'm being a little OCD about them, but they were not there before.
At first I thought it was a workholding issues so I bought two new Orange Vises. That didn't solve the problem so I figured maybe it was the toolholders and bought 10 new Albrecht milling chucks. Still no improvement.
I had a Haas Tech come out and inspect it last week and said he couldn't find anything mechanically wrong with it. He checked the backlash compensation and it was good. So I ran a couple of test pieces to show him the issue. He sent the code to a Haas Application Engineer and the response was that I am being too aggressive with the cut and take a smaller cut, up the sfm, decrease the chip load etc...
I've been making the same parts taking similar and heavier cuts since I've had the mill with no issues. The spindle load is about 25%-30% through the entire cut except in the one direction. So I don't understand why all of a sudden I'm expecting too much from it. The cut can be adjusted down to eliminate the issue most of the time but by then I'm cutting at about 20% of what I'd normally do. A part that used to take 15-20min now takes 45min-1hr. At the moment it's not realistic to cut steel because of how slow I have adjust it, even then I still have some chatter issues.
I've tried different materials, different cutters, different feeds and speeds, different DOC and WOC, different methods of holding the material, but still have the same issue.
A new Tech is scheduled to come out this week and I am hoping that you guys can offer some input on what I should have him check and look for.
At first I thought it was a workholding issues so I bought two new Orange Vises. That didn't solve the problem so I figured maybe it was the toolholders and bought 10 new Albrecht milling chucks. Still no improvement.
I had a Haas Tech come out and inspect it last week and said he couldn't find anything mechanically wrong with it. He checked the backlash compensation and it was good. So I ran a couple of test pieces to show him the issue. He sent the code to a Haas Application Engineer and the response was that I am being too aggressive with the cut and take a smaller cut, up the sfm, decrease the chip load etc...
I've been making the same parts taking similar and heavier cuts since I've had the mill with no issues. The spindle load is about 25%-30% through the entire cut except in the one direction. So I don't understand why all of a sudden I'm expecting too much from it. The cut can be adjusted down to eliminate the issue most of the time but by then I'm cutting at about 20% of what I'd normally do. A part that used to take 15-20min now takes 45min-1hr. At the moment it's not realistic to cut steel because of how slow I have adjust it, even then I still have some chatter issues.
I've tried different materials, different cutters, different feeds and speeds, different DOC and WOC, different methods of holding the material, but still have the same issue.
A new Tech is scheduled to come out this week and I am hoping that you guys can offer some input on what I should have him check and look for.
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