This might help reprap
February 22, 2008 02:17AM
Check out these linear actuators that can be etched right onto a PCB:
[www.idlmotors.com]

I have no idea how they work though, presumably it involves magnets.

A fluid mechanical sewing machine:
[arxivblog.com]
Apparently, you can make different patterns by varying the extrusion height and speed.
Re: This might help reprap
February 22, 2008 07:46AM
Fascinating! looked around a bit and found this page:
[blog.makezine.com]

Lots of stuff there. Search for 'z-drive'. Then you'll see that it works with magnets. At first sight it looks like a regular linear motor. Interesting question is how they got the coils that flat.

Howie


--
Airspace V - international hangar flying!
[www.airspace-v.com] for tools and toys
Re: This might help reprap
February 22, 2008 08:58AM
Looks like the coils are just spiral tracks on the PCB.


[www.hydraraptor.blogspot.com]
Re: This might help reprap
February 22, 2008 09:16AM
I wonder what kind of positioning resolution they get?
Re: This might help reprap
February 22, 2008 09:27AM
Same principal as a rotary stepper I would think. The gap between the magnets sets the basic step size but you could micro step to get higher resolution.


[www.hydraraptor.blogspot.com]
Re: This might help reprap
February 22, 2008 11:00AM
ooo... etched linear motors.. gimme now... gimme now... I want NOW!!!


ahem.... sorry, went into 4 year old in a toyshop mode for a second, normal service will be resumed shortly, meanwhile here is some light music...
Re: This might help reprap
February 22, 2008 01:31PM
spinning smiley sticking its tongue out
Attachments:
open | download - Kitty wants shiny device.jpg (63.7 KB)
VDX
Re: This might help reprap
February 22, 2008 02:48PM
... look here in an old discussion about reprapping/reprappable linear drives ...

Viktor
Re: This might help reprap
April 12, 2008 05:12PM
heh patents pending... yeah good luck patenting that lol. anyway its just a simple linear motor on a pcb. you just make the tracks in the shape of coils. it wont have much force behind it i suspect, compared to conventional linear motors where you have lot more coils. its can be built with reprap ofcourse but i doubt it would have any use in reprap machine due to the lack of power
Re: This might help reprap
April 20, 2008 01:09PM
stack them for more power.
Re: This might help reprap
May 04, 2008 09:14AM
hmmzzzz.... lets say 4-5 layer pcb-s, stacked like 10 of these on top of eachother.... why not you could technically get smth out of it
lets start building pcb mass drive tongue sticking out smiley
Re: This might help reprap
May 29, 2008 12:33PM
you have to admit, having a little train going around your reprap as it printed would be great. you could also make a really long one and use it to indicate how long the printing job has to go.
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