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Auselectric
07-16-2010, 11:52 PM
http://www.japanservo.co.jp/digital/english/general/pdf/KH42K.pdf

Will these steppers be big enough to run a small hotwire using ball race draw runners?

port_huon
07-17-2010, 01:28 AM
How heavy is the gantry (moving parts) of your design?

Auselectric
07-17-2010, 01:59 AM
How heavy is the gantry (moving parts) of your design?

Have not started the build just in the planning stages, but as I will only be using this for personal use I will attempt to make it a light as possible

Dorsal
07-17-2010, 02:16 AM
For a hot-wire, the steppers could be much smaller than those, and would work well. Remember, the magic to a hot-wire is to make the wire hot enough to go through the foam, but not hot enough to create smoke. If there's smoke, you're WAY too hot! If the wire is at the correct heat, it will leave small strands of "angel hair" in the cut.
Once you reach the correct heat, the CNC will move the wire at about 3 - 5 inches per minute, and there isn't a lot of pulling force required.

Also, get yourself some Rene foam cutting wire - this stuff is light-years better than Ni-chrome or safety wire or piano wire, trust me. I bought some from these guys and I'll never waste my time with anything else. http://www.skykingrcproducts.com/accessories/foamcutterwire/renewire.html

gmfoster
07-18-2010, 05:40 PM
I think you need to start your poll over. I know I voted wrong. The question ought to be "Are these steppers big enough to >>>>>>>

So my yes should be a no in your poll..

Scott Lister
10-19-2010, 01:39 PM
For a hot-wire, the steppers could be much smaller than those, and would work well. Remember, the magic to a hot-wire is to make the wire hot enough to go through the foam, but not hot enough to create smoke. If there's smoke, you're WAY too hot! If the wire is at the correct heat, it will leave small strands of "angel hair" in the cut.
Once you reach the correct heat, the CNC will move the wire at about 3 - 5 inches per minute, and there isn't a lot of pulling force required.

Also, get yourself some Rene foam cutting wire - this stuff is light-years better than Ni-chrome or safety wire or piano wire, trust me. I bought some from these guys and I'll never waste my time with anything else. SkyKing Rene foam cutting wire (http://www.skykingrcproducts.com/accessories/foamcutterwire/renewire.html)

If you are getting angel hair thrn your wire is dragging and the temp is wrong. You want an orange peel like surface on the foam and not have the wire in contact with the foam.


Scott