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Post by My 2 pennies on Apr 22, 2017 3:27:41 GMT -5
Hi Mafell users Which would be better and more useful : www.cncdesign.co.uk/cnc/Birch-Ply-Replacement-Perforated-Festool-Type-Top.html to use with dogs pegs on site. or the Mafell 205357 F-WA Angle fence For Guide Rail or shall I buy both ? does the fwa angle fence give accurate 90 cuts? Would the cnc top be to small for cutting down ply sheets? Also which perfotated type top shall i buy the birch or the mdf?
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Post by holmz on Apr 22, 2017 4:41:36 GMT -5
The F-WA fits in the Bosch/Mafell bag.
Imagine I have a 2x8 that is 3m long to cut to some length... Basically it is too long to balance on the MFT. I make a mark with the tape measure, and use combination square to make it square on the 2x8. Then I remeasure it. Then I clamp the F-WA to the 2x8 and then either use the p1cc or the MT55l keeping F-WA's splinter guard on the line.
If it is a piece that is 5', then I whack it on the MFT (if it is setup), and I cut it on the dog holed top.
But if I am lazy, then I may use the F-WA if it close.
Basically => get both... (IMO)
Plywood: Depends... It is a cabinet door that is small enough then the MFT or holey board/table works. Birch is nice, but I think (but do not know) that the MDF may be more stable and probably has a better hole for the dogs... Maybe the ply would get buggered on the top and bottom over time??
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Post by My 2 pennies on Apr 22, 2017 5:05:22 GMT -5
the mdf one is £40 the birch is £50 + vat
I thought the birch might hold its shape and accuracy better with using the dogs/pegs repeatedly?
If the Mafell angle fence is not accurate and you have to check square and measure , then what's the use for it?
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Post by aas on Apr 22, 2017 5:20:39 GMT -5
If the Mafell angle fence is not accurate and you have to check square and measure , then what's the use for it? erm.. for angles? :-) It's actually a very handy addition to the rails - not as a square - but it has it's place. I wish it had a 90 degree lock down that was 100% square - but for replicating angles across several cuts it's a real time saver.
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Post by kraftt on Apr 22, 2017 9:11:41 GMT -5
..... to use with dogs pegs on site. .... the birch or the mdf? By 'on site' do you intend to set either into a table frame (MFT) or are these to be used as quick portable tops you throw atop stands etc.
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Post by My 2 pennies on Apr 22, 2017 12:13:17 GMT -5
Yeah on some trestles
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Post by My 2 pennies on Apr 22, 2017 12:14:47 GMT -5
Why is it not accurate at 90?
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Post by ohan on Apr 22, 2017 13:37:35 GMT -5
I think over any amount of length you'd have a problem maintaining perfect squareness with a beam that small.
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Post by kraftt on Apr 22, 2017 13:45:25 GMT -5
Then I have the same curiosity about stability as holmz brought up. --------------- In my area there are a number of shops with CNC machining stations/tables, I've yet to have them make a MFT top for me but the precision on other projects has been impressive. I always thought that if I did have them make a portable top I probably wouldn't design in as many holes to keep costs down since it would just be for basic job site use. And, of course, I would want to use up the full sheet of whatever I supply them with and cut out at least two tops, one for flat storage as backup. I mention this because even though that looks like a good price in the link you posted, unless they are local you'll pay some shipping. If you do have a CNC shop near by you're only a CAD file away from getting something custom for possibly less.
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Post by My 2 pennies on Apr 22, 2017 14:54:23 GMT -5
Yes thanks a good idea , il check if there is a local cnc to me. I agree that I prob won't require so much holes but how many would be aduquate? . there is shipping on that I'm not sure how much yet. I cut 900 worktops and kitchen end pannels. I also trim door sides and shorten them what would be a good size sheet?
Also I don't understand why the Mafell angle fence is not accurate , if the fence connects to the rails which are famed for their straightness and seem less connection ?
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Post by aas on Apr 22, 2017 15:31:53 GMT -5
Also I don't understand why the Mafell angle fence is not accurate , if the fence connects to the rails which are famed for their straightness and seem less connection ? The angle fence connects well to the rails - it's the short bar and angle scale that are the weak point. To be fair - if the bar was long, we'd be complaining it isn't practical! When I need it as a square, I set it using a 3rd party square, and it works perfectly - just need to lift the rail, push the bar to the front edge, and let the rail gently back down to the work piece.
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Post by kraftt on Apr 22, 2017 16:09:05 GMT -5
... but how many would be adequate? minimum number, that’s a good question. I suppose, depending on size of ‘portable’ table and only using dogs: Back stop would be 3 holes running 90º to rail. Unless you bring some kind of angle fence that registers with dogs - then 2 holes. The 3rd hole would be for shorter length sheet. But if the table is deep/wide then another set of 3 closer to operator when cutting narrow boards. Guide rail would be 4 holes. 2 for max table width and 2 closer in. And then salt & pepper to taste for 45º’s, clamping etc. Or give up the 2 closer in rail holes to drill more elsewhere for clamping. If it saves any cost you can cut in your own oval handles and larger perimeter clamping holes later. Lets say a spartan 14 ish holes vs the 77 in the link to the birch mft. It may come down to the shop minimum charge as to how many holes you drill meaning they might say you can have 77 for the same price. The minimum charge may be that you can go buck wild and add pencil troughs company logos. Or you may have to split the number to get 2 or 3 copies from one sheet. If you already own some dogs bring them along for a test fit. Maybe make two that each have ‘keyed’ edges to make clamping into a larger table quick and accurate? Curious if anyone knows the grade of mdf used for MFT tops. Has anyone tried ultralight mdf ? What do others think?
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Post by holmz on Apr 22, 2017 17:03:52 GMT -5
... but how many would be adequate? minimum number, that’s a good question. I suppose, depending on size of ‘portable’ table and only using dogs: Back stop would be 3 holes running 90º to rail. Unless you bring some kind of angle fence that registers with dogs - then 2 holes. The 3rd hole would be for shorter length sheet. But if the table is deep/wide then another set of 3 closer to operator when cutting narrow boards. Guide rail would be 4 holes. 2 for max table width and 2 closer in. And then salt & pepper to taste for 45º’s, clamping etc. Or give up the 2 closer in rail holes to drill more elsewhere for clamping. If it saves any cost you can cut in your own oval handles and larger perimeter clamping holes later. Lets say a spartan 14 ish holes vs the 77 in the link to the birch mft. It may come down to the shop minimum charge as to how many holes you drill meaning they might say you can have 77 for the same price. The minimum charge may be that you can go buck wild and add pencil troughs company logos. Or you may have to split the number to get 2 or 3 copies from one sheet. If you already own some dogs bring them along for a test fit. Maybe make two that each have ‘keyed’ edges to make clamping into a larger table quick and accurate? Curious if anyone knows the grade of mdf used for MFT tops. Has anyone tried ultralight mdf ? What do others think? The local shop wanted $500... I suppose I could try again with a CAD file in hand, but they may just want to see the back of me. i could try again if you have a CAD file.
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Post by My 2 pennies on Apr 22, 2017 18:21:40 GMT -5
Stability is not problem because I sit the trestles on 3 planks that I carry on van , it makes a long table. If I need to clamp I can remove or reposition individual planks.
ok so if i set the fwa angle fence with my engineers square and tighten it then Carfully place it on the cut surface will that be accurate then?
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Post by kraftt on Apr 22, 2017 19:50:17 GMT -5
Stability is not problem because I sit the trestles on 3 planks ... I took stability as warpage. Once ply sets a bend vs mdf in a hot van etc.
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