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andy_con
10-06-2016, 02:46 PM
im pretty new when it comes to machining wood, im used to metal work holding.

I see lots of reference to double sided tape and glue for work holding.

ive been kindly given some ash, cherry, American black walnut and oak. these being hard woods required a bit more than double sided tape (unlike MDF)

what methods do people use?

all recommendations welcome

I do things like this so a vacuum table is out the question ;)

http://i187.photobucket.com/albums/x202/magicmushrooms1/cnc/DSC_0555_zpszjl8oiwg.jpg

http://i187.photobucket.com/albums/x202/magicmushrooms1/cnc/DSC_2165_zpsi1yvenbz.jpg

magicniner
10-06-2016, 02:53 PM
Superglue to a thin metal sheet, 3mm Aluminium is good, clamp the sheet down and when you've finished flip the work and heat the back of the sheet to break the superglue bond.
Mitre-Bond from Wickes is good as it's activated and reaches full strength really quickly, I use it to hold all manner of materials down to aluminium plates, you can "kiss" it with your cutter too without any worries at wood routing speeds,
Regards,
Nick

Washout
10-06-2016, 02:54 PM
Hi

I have used tape only on rosewood fretboards and maple necks (and aluminium) - see here:
https://www.youtube.com/watch?v=yBn8HyEg1E4 and
https://www.youtube.com/watch?v=lFfwrKdfsCw

I think the holding power of tape is probably more to do with depth of cut than material hardness per say (I'm no expert) and over a certain depth I tend to use screws into a sacrificial plywood bed if possible or clamps if I'm not going through the material.

andy_con
10-06-2016, 03:04 PM
I agree there, I was testing a 6mm end mill, doing 3mm DOC at 600mm/m and the wood was moving. I was probably going a bit fast there

johnsattuk
10-06-2016, 03:56 PM
I use Vilmill on my vacuum table

https://www.youtube.com/watch?v=xe-h7kTY1q0

andy_con
10-06-2016, 04:05 PM
can you buy it in the uk?


I use Vilmill on my vacuum table

https://www.youtube.com/watch?v=xe-h7kTY1q0

johnsattuk
10-06-2016, 04:59 PM
Don't know of a UK supplier, I just buy mine from Germany

johnsattuk
10-06-2016, 05:05 PM
Doesn't work for everyone, needs a good vacuum pump, not so good on a vacuum cleaner

andy_con
14-06-2016, 01:31 PM
Don't know of a UK supplier, I just buy mine from Germany

My Denford microrouter has a built in Vacuum pump

Got a link where to buy the mats?

johnsattuk
14-06-2016, 02:33 PM
Googled -

http://cnc-plus.de/en/Workholding/Vacuum-Accessories/52cm-Vilmill-Black-BZ-5790---Mill-Through-Mat-.html

http://portatec.de/en/vilmill-service-verkauf/

http://vacuumtables.co.uk/product/5-x-vilmill-6040/

andy_con
22-07-2016, 05:23 PM
so following on from this threat I decided to do some R&D with different glues and ive found a winner.

http://www.screwfix.com/p/no-nonsense-mitre-adhesive-200ml/41795

I also purchased the cheapest 50mm wide masking tap from screwfix and it all worked a treat.

I used this method but with the glue from screwfix


https://www.youtube.com/watch?v=3uTsQ3dYRrk

just done the below, its pretty small at 100mm by 100mm but the gluing method worked 100% perfect and just popped right off once I was finished. I only used a tiny bit of glue so its going to last ages. it dried and was rock solid in about 30 seconds

http://i187.photobucket.com/albums/x202/magicmushrooms1/cnc/DSC_2395_zpsherguv8h.jpg

next I want to try cutting letter out like this

http://i187.photobucket.com/albums/x202/magicmushrooms1/cnc/DSC_2394_zpskmmjojmu.jpg

magicniner
22-07-2016, 07:39 PM
Good Call!
I use Wickes Mitre Bond, an activated cyanoacrylate, and an aluminium tool plate when I'm machining and/or profiling small parts from gauge plate, stainless and titanium on the milling machine.

- Nick