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Flipping Sheet Material

9/15/16       
Stewart Member

Okay, I have to ask how do you guys handle your sheet goods at the CNC when approximately 25% of them have to be milled A face down? Currently, we just slide off the forklift and then muscle the turnover. It's feels like a lot of wear on the back. 5 x 8's are impossible without grabbing an extra hand which interrupts their work flow. I've thought about pre-organizing my material into one stacked bunk per job with the faces appropriately up or down. Then, all the operator needs to do the next day is grab and go. Would this be too much handling? I also thought about a vacuum lift but just can't wrap my mind around how to flip with one of those in an efficient way unless I could somehow go to 90 degrees, place it on a vertical cart and then come around and grab it from the back side to complete the flip. How do you guys handle this?

9/15/16       #2: Flipping Sheet Material ...
chipbored

Do you mean that you get the material wrong way up and you have to flip it arund to cut correctly on the CNC? I just asked our board supplier about this the other day because we get some material with a protective film on the front and we have to flip the sheets to cut them on the CNC so the front of the door has the film on it.

Is the problem that you are receiving the sheets wrong way up or that you need to flip them to check them regardless of how you receive them?

It breaks my heart manually handling those sheets with a CNC that auto loads ect. ect. What a great time waster!!

9/15/16       #4: Flipping Sheet Material ...
Chad R  Member

Website: http://www.northwayind.com

We rainbow stack our material with the correct face up before it moves to the router. (No auto-feed on the routers.) Eliminates operators flipping, and running the incorrect face up. The pack of nests match the stack fed to the router. Will never look back.

https://youtu.be/HD87ou8NxHk

9/15/16       #5: Flipping Sheet Material ...
Stewart Member

When we receive the sheets from the supplier, they are almost always A face up (except for an occasional odd one here and there) which is great because most (75%) of what we do requires the A face up on the machine. Having to flip for the other 25% is the main reason I didn't get the onload feature. I guess if I could buy my sheets as AA grade, it wouldn't matter so much except that the cost would skyrocket. I also find that I have to quickly inspect the back side to make sure there's not the odd defect that would ruin a piece seen from both directions. Chad, when you rainbow stack, do you just use a couple of guys to get it done? How long does it take you to put a stack together? Do you use a vacuum lift? A typical project for us would run about 40 sheets on average.

9/15/16       #6: Flipping Sheet Material ...
Chad R  Member

Website: http://www.northwayind.com

We are in a different situation. We laminate our panels here. So for us it starts at the beginning. The panels are pressed with the correct side up. The panels are the put into a stacker system. A couple of bunks of material are in the system at the same time. A mix of colors, sizes, thicknesses, HPL, LPL. A job is then entered into the computer, and the stacker creates the rainbow stack. These stacks are based on 4 hours of work. It does pick the panels using vacuum, but is computerized.

9/15/16       #7: Flipping Sheet Material ...
Kevin Jenness

Website: http://kevinjenness.com

Shopcarts makes a panel flipper that might work for you.

flip cart

9/16/16       #9: Flipping Sheet Material ...
Dropout Member

Mount another CNC upside down on the ceiling.

The vacuum will be strong enough to hold the material up to the table.

Problem solved.

9/16/16       #10: Flipping Sheet Material ...
cabinetmaker

While the cnc is running we ask the operator to prep his next job, but 10 minutes is not to bad for a few sheets to be flipped for the big jobs, we tell the panel hpl suppliers, 20 face down of this and 30 of this, operator checks before cutting of course and the melamine white 5x8 is a no brainer

9/17/16       #11: Flipping Sheet Material ...
Stewart Member

Thanks everyone for the responses! That's a great idea asking the supplier to orient for you (I guess the worst they could say is, "No"). Kevin, I looked at those flip tables - those are cool! I could totally see that especially in conjunction with a vacuum lift.

9/17/16       #12: Flipping Sheet Material ...
jonathan mahnken

I flip sheets by myself all the time... Is this really an issue? Maybe you should just hire an operator who is capable of the task?

9/20/16       #13: Flipping Sheet Material ...
Hill Jeffrey  Member

Website: http://thehomerenovation.tumblr.com/post/149832331...

Its very easy to flip the sheets. If you can't do it then go for a professional.

10/8/16       #14: Flipping Sheet Material ...
Scott

Can some one tell me what I am missing here? Why does it matter which face is up or down on a cnc? Best way to move sheet goods is with a panel vacuum lift.


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