Anyone tried feeding the filiment from off the head through something like Mig gun liner - ie same way a Mig welder does it?

Wondering if by doing this, you could maybe feed more than one filiment into an adapted hotend, enabling you to switch colours/filiment types during print.

or is this going to cause some loss of control/add some lag into the system, reducing acuracy/cause other problems.

It's called a Bowden extruder, and has been used on many machines.
See:
[reprap.org]
and
[blog.ultimaker.com]

Ah, so it's been done, and successfully too.

Nice to know the name of it and can look into it further now.

Erik looks like he's got some good documentation: [reprap.org]


Has anyone successfully done it with multiple filiments going into the same hotend?

se5a Wrote:
-------------------------------------------------------
> Has anyone successfully done it with multiple
> filiments going into the same hotend?

Not that I have seen, doesn't mean that it hasn't been done though.