Re: [CAD_CAM_EDM_DRO] Re: CNC and Welding Polyethelyne

Hans,
I remember watching somone hand weld up a Poly RV holding tank many
years ago, the gun used a hot air blast and a rod of the same type of
material as used to make the tank. If you haven't been to a couple of
shops that do this work you might want to do so for Ideas.
Bill HigdonHans Wedemeyer wrote:

> Thanks for info.
> Airplane wing cutting is relatively simple using a hot wire to "cut" foam. I need to Weld. which is a different issue.
>
> The CNC part is not a problem, I will write my own program for it.
>
> I need idea's on welding head design.
> So far suggestions are :
> Hot Air Gun and Laser.
>
> Best regards
> Hans W
>
> "ballendo " wrote:
>
>
>>Hans,
>>
>>Your application seems similar to the foam cutting of wing cores done
>>by model airplane enthusiasts. They also have to control the heat in
>>a wire, while also moving four steppers...
>>
>>If you search on foam wing cutting, you should turn up a French site
>>with good info, called cnc.net or some such. There is software,
>>wire "heat" control circui and board, machine axes, etc., there. A
>>German site/product called Step4 may have additional info and insight.
>>
>>Good luck,
>>
>>Ballendo
>>
>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Hans Wedemeyer <xyz@h...>
>>wrote:
>>
>>>Soon I hope to get started on a project to weld Polyethylene sheet
>>
>>(6-10 mil) using CNC to control the welding head.
>>
>>>The CNC part is no problem. Does anyone have and information on
>>
>>designs for a head to weld Polyethylene sheet ?
>>
>>>Playing with a simple heat wire stripper I'm able to get string
>>
>>welds but soon realize I need to control the heat and keep the
>>welding head moving.
>>
>>>Any tips or links would be welcome.
>>>
>>>Best Regards
>>>Hans W