Moved a machine and now getting poor tool life!! Help!!

[jmk021083]

We have a Daewoo Puma 240 that we proved out a roughing program. We ran plenty of parts and were getting around 150 parts per corner. We thought that was good considering what we are doing so we moved that exact machine 50 yards to the other side of the building to attach a robot to load it and our tool life is poor now. We are lucky to get 40 parts per corner now without a blowout. Same exact everything with a robot loading which we are verifying that its correctly being loaded. Our maintenance technician looked at it and found a few things that could be adjusted and fixed but didn't change anything. Any thoughts or comments will be appreciated. Thanks in advance.

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[drdos]

The problem with moving a machine is risk knocking it out of level and squareness. You will need to get someone it there with a level and check the squareness. Also, make sure the foundation of where you moved it to is the same as where you moved it from. Also, if you have pitch error data you may have to re laser the axes and readjust the pitch error.

[dhardt]

While I absolutely agree with what drdos is saying...The puma 240A is a small body machine.

Meaning that there is not much ability to "flex" or bend the machine.

Even the 240C, the largest of the group can only flex "so-much"

Anything bigger than a Puma 300 Long-bed can severely twist, crown, or cup over the length of the machine, but the smaller unit would need J-bolts to be lagging it to the floor "improperly" for it to alter the performance by that much..."Just sayin"


That being said...a properly leveled machine definitely runs BETTER than an improper one.

[prosol]

What did you move it with? Is the concrete floor exactly the same on both sides of the building?

[jmk021083]

It was moved with a steel roller dolly on each foot. The floor is concrete and very old. It is very uneven and we rely on the machine being leveled by maintenance.

[RCaffin]

I do not understand why moving a machine, even if it ended up not level, would have any effect on tool life. I just can't see it.
Accuracy - maybe, but only on a large router-style machine.
I would look for other things myself.

Cheers
Roger

[mactec54]

I agree with RCaffin moving a machine like this is not going to change, anything to do with tool life, even if it was not leveled correctly

You need to be checking the Spindle, tooling fit in the Spindle, workpiece clamping, you automated how the workpiece is mounted, may be it is not being clamped well enough, check what the life of your inserts should be with what they are are cutting, their life may be right where it should be and you got lucky with the batch of inserts you used before, or were being more conservative with the cutting

[jmk021083]

I agree with what you are saying but there is something we are missing. We are getting 25% of the tool life we used too. Its not just a slight difference. Alignments and levels have now been checked. They even found some broken bolts in the turret which were fixed. We are using a Sandvick WNMG 433MR Gr 4305 Insert in 4140 Quenched and tempered material. We had this roughing operation outsourced for a period of time and they had come up with this insert choice along with the speeds, feeds and DOC. They were also using this exact robot setup to run it. We bought this from them and put it together in our building with one of our CNC lathes. This seems just crazy because we could replicate what they were doing on our lathe hand loading. We then moved the machine and applied the robot for loading and poor tool life results.