Re: [CAD_CAM_EDM_DRO] TOOL CHANGER , EMC AND STG2

Asim Khan wrote:

>Hi friends!
>
>I am unable to find tool changer option in EMC. There isnt any tool
>changer related input and output ports defined in ini.
>I've started browsing the sources of emc. i've seen some of the c
>code files contain some wraper functions related with tool change
>
>

Right. That is about all there is right now, is the wrapper. It would
not be too hard
to write the code to control a relatively simple tool changer directly
from C code.
Probably the hardest thing is if the tool changer required the spindle
to be brought
to a specific position, then you'd have to hack deeply into the
interpreter or the
motion routines to accomplish a spindle move that is not explicitly in
the G-code
stream.

>Can somebody guide me if i implement the tool change functionality
>in emc then what source files i might need to edit? and what
>challenges and difficulties i might face during this work?
>
>

The only other things are to figure out how to accomplish a timed delay
in the
C code (I think the standard system wait calls would be accurate enough
for this),
and to set up another parallel port for the number of I/O points you'd need.

>also if somebody could guide me about how and at what level the tool
>changer fucntionality is implemented at the moment in emc?
>
>

I think the wrapper routines get the requested tool number passed to
them, and cause
the motion to pause until they are finished.

Jon