Giant hot wire cutter

[charlieuk]

With the goal posts fixed? Not unless I had nearly 40' of shed. I think it's going to have to be a moving gantry design of sorts. The one bellow is one I have seen on Google that looks rather nice but possibly a bitt by be over the budget to build the same.

[charlieuk]

this was the other which is perhaps the opposite it terms of build strength but certainly simple ish

[charlieuk]

and this is what I am wondering about for rails

http://www.cncrouterparts.com/linear...ent-p-100.html

however I cant help but think if I use extrusion there must be a way I could use the aluminum as the rail and have some sort of rubber wheel as the forces are going to be so low along with the weight of the gantry being pretty small all so. I am aware of the v rail aluminium but I don't think it comes in 6m lengths.

then there are the wheels you can get from kjn but not sure if they would be up for the job and there are quite pricey considering you would need probably 6 or 8 per rail.
http://www.aluminium-profile.co.uk/a...40.html#SID=71

[mekanik]

Hi Charlie
With the limitation on working area, best option would be to knock up a trolly with integral adjustable hot wire cutter and run it along the top of your block.
No need for anything complicated.
Regards
Mike

[magicniner]

If space is really tight have you thought about having your rails against the sidewalls of your shed with the gantry parking against the back wall?
If you used a system based on tube frame roller coaster designs you might get a large proportion of what you need from scaffold poles & fittings, with the outside faces of the horizontal runners free for adding support to get them straight and level,
Regards,
Nick

[EddyCurrent]

Ceiling mounted ?

[charlieuk]

Thanks for those ideas they have given me a lot to think about. the idea of actauly just having a frame sit on the block would be a nice and compact however i would have to cut the full length each time to get a flat surface.

wall mounted could be a option but i would need to think about shifting the block around as they are so large and heavy and im my own most of the time. ceiling could work also although probably not the most solid part of the shed and im 6'2 so metal sticking down may get annoying but still worth thinking about

im wondering if i had something floor mounted i could possibly build a raised false floor around it so i could slide the blocks on and around easily with no lifting same goes i suppose if it was ceiling mounted

what ever i build i would like the option to be able to upgrade it to 2 or 4 axis cnc in the future