LinuxCNC & 2 routers

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22 Apr 2014 21:32 #46220 by vperushka
Hi! Please advise is it possible to control two independent routers at the same time? Both spindles will cut one part just from different sides (one from left side second one from right side).

Thanks in advance!

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22 Apr 2014 22:48 #46223 by Todd Zuercher
Replied by Todd Zuercher on topic LinuxCNC & 2 routers
The answer is a definite maybe.

Whether or not it can be done depends on what exactly the machines configuration is, and what exactly you want to achieve.

I have done machines with multiple Z axis (Z and W) each with a router, on shared X and Y axis.
if you need to have independent axis for X and Y you could add U and or V.

Do you need left and right to be mirror of each other?

It can all get very complicated, with a lot of little caveats. Such as G64 blending doesn't totally work with axis other than XYZ.

But at a certain point, comes the question of whether or not you might be better off with 2 completely separate machines.

It all comes down to how clever you can be with some of the little details.

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22 Apr 2014 23:31 #46224 by vperushka
Replied by vperushka on topic LinuxCNC & 2 routers
>>> Do you need left and right to be mirror of each other?
Interested to cut holes and pockets in wood logs. axis can not be mirrored

>>> It can simultaneously move up to 9 axes and supports a variety of interfaces.
is it possible theoretically to drive even 3 routers? :-)

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23 Apr 2014 22:21 #46256 by andypugh
Replied by andypugh on topic LinuxCNC & 2 routers

is it possible theoretically to drive even 3 routers? :-)


Yes and no.

The problem is that each line of G-code runs in sequence. So you can't set up an XYZ move and a separate UVW move. If you put them both on the same G-code line then they will both start at the same time and end at the same time (so only the XYZ feed rate will be what you asked for if the distances moved are different.)
If you put the moves on different G-code lines then the XYZ move will complete then stop and wait fore the UVW move to complete.

If you were to use a postprocessor to create G-code that automatically compiled equal-length moves in XYZ and UVW then it would work fine, but otherwise it won't.

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23 Apr 2014 23:20 #46262 by Todd Zuercher
Replied by Todd Zuercher on topic LinuxCNC & 2 routers
Another problem with using extra axis like UVW is that you can't to things like G2 and G3 moves.in those planes.

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