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Thread: MDF Cut To Size, 16 Cuts Or 10?
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31st August 2021, 01:35 PM #1Novice
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MDF Cut To Size, 16 Cuts Or 10?
Hi,
I recently had a 2400 x 1200 sheet of MDF cut into the sizes I wanted, pretty straight forward. The place I bought the MDf from uses cutlist optimizer to work out the cuts, that program says 16 cuts(see attached pic), and that is what I was charged for, however I can only count 10 cuts(see my dia with cut numbers)cutlist optimizer.jpgDocument (45).pdf, am I counting wrong?
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31st August 2021 01:35 PM # ADSGoogle Adsense Advertisement
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31st August 2021, 02:16 PM #2
I can see the 16 cuts. The first cut gives you the 660 wide strip, that is then cut into the 4 panels (4 cuts since there is 20mm waste to cut off last panel, then the other bit of the sheet is cross cut into the first 700 width, that is cut into 2 panels plus waste (3 cuts) which is repeated twice with final panel trimmed to size on 2 sides.
Franklin
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31st August 2021, 02:26 PM #3Woodworking mechanic
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Guess it depends on how the cutting is done. I can see doing the job with 12 cuts but it probably isn’t the way I would do it in real life.
- cut off the excess top and side - 2 cuts
- cut lengthways down the “middle” - 1 cut
- cut the LH side into 4 pieces - 3 cuts
- cut the right hand side horizontal into 4 pieces - 3 cuts.
- cut the RH lower three panels in two - 3 cuts
If it was me on my table saw, I see 16 cuts as being the best/easiest route with minimal fence changes.Last edited by Lappa; 31st August 2021 at 02:42 PM. Reason: Additional
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31st August 2021, 03:08 PM #4Novice
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Ok thanks for the replies, can see it now....my lack of experience
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31st August 2021, 05:14 PM #5SENIOR MEMBER
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No they charged you for 16 inside faces. No way it would take 16 'cuts.'
10 cuts to do the job.
I use maxcut, a free program to do the same by the way.
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31st August 2021, 05:16 PM #6SENIOR MEMBER
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31st August 2021, 06:28 PM #7
You can get over size blanks with only 10 cuts, but they wouldn't be 'cut to size'. There is waste on two sides of the sheet in that cut list.
Franklin
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31st August 2021, 06:30 PM #8SENIOR MEMBER
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Ah, thanks Fuzzie. I think I need a bigger screen, or new glasses
Or both!
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31st August 2021, 06:48 PM #9Taking a break
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Just ran through it and I can't make it less than 18, basically what Fuzzie did, but I think he forgot the trim cuts.
- Trim long edge
- Trim short edge
- 660 rip
- 660 x 660 cross cut
- 660 x 660 cross cut
- 660 x 660 cross cut
- 420 x 660 cross cut
- 700 cross cut
- 700 cross cut
- 700 cross cut
- 360 x 700 rip
- 360 x 700 rip
- 360 x 700 rip
- 180 x 700 rip
- 180 x 700 rip
- 180 x 700 rip
- 300 rip
- 540 x 300 cross cut
If anyone can make a step by step list where every part gets cut on all 4 sides that's shorter than 18, please post it as I'm extremely curious how you get there.
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31st August 2021, 07:55 PM #10Woodworking mechanic
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Why do the ones on the left have to be cut on all four sides?
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31st August 2021, 08:04 PM #11Taking a break
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Because that's the only way you will get a guaranteed straight, square and clean cut. Maybe you'd get away without a trim cut on MDF, but it's not best practise.
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31st August 2021, 08:12 PM #12Woodworking mechanic
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If that’s the case then the 3rd cut couldn’t be 660 as it would leave nothing to trim for the 4th (LH) side.
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31st August 2021, 08:15 PM #13Taking a break
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Why not? Standard sheet is 1220 wide, plenty of material for a trim cut
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31st August 2021, 08:26 PM #14Woodworking mechanic
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True but your have cut to 660. That leaves 560 which is 540 plus your 20 waste. Wouldn’t you need to cut to eg 670 to allow you to trim the LH side down to 660?
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31st August 2021, 08:35 PM #15Taking a break
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All the first trim cut does is clean up the edge, it doesn't matter if it's half the width of the blade. I'm working on the left side being the start edge, so you trim a couple of mm, then rip 660
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