Idea for coolant control...

Hi!
I am working on a 5 axis linuxcnc retrofit. I am thinking about adding servo controlled coolant. I would liket to have, lets say 4 nozzles, that can be adjusted so that they hit the right spot.

With the CNC mill I have right now operational I need to manually adjust coolant lines and that is a mess. Leaning into the cabinet sometimes poking on the coolant nozzle to adjust them when milling has started. Repeating for each tool.


A simple thing would be to have one potentiometer and just control the angle of the coolant nozzle up and down. This way I do not need to lean into the cabinet etc. However, it would be nice to be able to control it from linux cnc and off course finally have coolant angle linked to the tool table.

One Idea I have is to use RC-servos (comes in many versions, some are quite decent). These are controlled by adjusting the pulse length of a pulse between 1 ms and 2 ms.

I wonder if such a pulse can be generated from linux cnc...? The machine I am working on has a mesa 7i77

Anyone who know if someone made something similar?
Any thoughts of how to improve this idea?

I sketched a simple "hobby servo"-solution. Idea is to use maybe four of these and adjust them together. (By mpg for example if possible)

 

/MrK
 

maybe rcpwmgen will do what you are looking for. It requires a customized bitfile.
linuxcnc.org/docs/html/man/man9/hostmot2.9.html#rcpwmgen

Thanks!
That looks like something that could be very useful. I am amazed by all the stuff supported by linuxcnc!

/MrK