Way to tie Pcool height to tool length?

[locash]

Seems to be a fairly logical thing to do, have the pcool height be referenced to the tool length, especially for those of us with probing.. I find it annoying that I have to manually set pcool for each job, when the machine already knows the tool length.. Am I missing something?

[txcncman]

It is logical up to the point until additional logic kicks in and you realize that you do not always want the coolant stream to be aimed directly at the tool tip. So, if you do figure out a way to do this, be sure to incorporate a way to turn the function on and off.

[arauchfuss]

Be pretty easy to implement if you feel so inclined. Just have to figure out angle delta between each coolant position and then do the geometry. You could make it part of your tool probing routine.

But as txcncman said there are plenty of cases where the coolant stream should not be pointed at the tip.

[KenFoulks]

If you could incorporate the diameter as well for shell mills, you should be able to accommodate most situations.

Here are the appropriate macro variables:

#2001 - #2200 Tool Length
#2401 - #2600 Tool Diameter
#3201 - #3400 Actual Tool Diameter
#3401 - #3600 PCool Position

[BobWarfield]

Tool diameter and top of workpiece seem like the two key things that together with tool length would let you at least get a programmable nozzle into the right neighborhood.

Can the pcool nozzle be controlled via g-code?

Best,

BW

[KenFoulks]

M34 and M35 will command the pcool position.

[txcncman]

Thanks Ken.

[DaOne]

Here is a macro that can be added to the Renishaw macros to set P- Cool.

Credits go to user pit202...

%
O09880 ( spigot position calcutation ) 
( **************************** )
( * author : pit202@wp.pl    * ) 
( * date   : 2009.05.04      * )
( * usage  : G65 P9880 Txx   * ) 
( **************************** )
#9= #[ 2000 + #20 ] 
#10= 66. ( min. tool length ) 
#11= 8. ( spig. pos. for min. tool ) 
#12= 185. ( max. tool length ) 
#13= 15. ( spig. pos. for max. tool ) 
#14= [ #13 - #11 ] / [ #12 - #10 ] 
#15= [ [ - #10 ] * [ #13 - #11 ] - [ #12 - #10 ] * [ - #11 ] ] / [ #12 - #10 ] 
#16= FIX[ #14 * #9 + #15 ] 
#[ 3400 + #20 ]= #16 
M99 
%

look at the first lines :

#10= 66. ( min. tool length ) 
#11= 8. ( spig. pos. for min. tool ) 
#12= 185. ( max. tool length ) 
#13= 15. ( spig. pos. for max. tool )

all you need to do is change those lines , find a shortest tool , messure it and find out which coolant position is the best, the tool length put in #10 value , and spigot position in #11 , do the same with a long tool , and put the values into #12 and #13.

get a code from VQC to messure the tool , after G65 Pxxxx line put

G00 G90
G65 P9023 A12. T1
G65 P9880 T1       < ----- line added manually

to not writing every time this line I added a line in the O9996 VQC file like this :

N1301 
(TEMPLATE) 
(NAME Auto Length Only)

..................

(GCODE) 

(T#ToolNo M06) 
(G00 G90) 
(G65 P9023 A12. T#ToolNo) 
(G65 P9880 T#ToolNo)             < ---- here is my line 
(M30) 

(END GCODE)

[locash]

Sweet, thanks for the help guys!

[Pondo]

The amount of thought and effort that goes into avoiding a little task is amazing sometimes.

...not that I don't do the exact same thing constantly.

I set the coolant as the first part is run. I watch the approach of each tool anyways, so when I let the coolant go on I just enter the coolant offset as it begins its cut.

[txcncman]

The amount of thought and effort that goes into avoiding a little task is amazing sometimes.

...not that I don't do the exact same thing constantly.

I set the coolant as the first part is run. I watch the approach of each tool anyways, so when I let the coolant go on I just enter the coolant offset as it begins its cut.

+1

[Machineit]

The amount of thought and effort that goes into avoiding a little task is amazing sometimes.

...not that I don't do the exact same thing constantly.

I set the coolant as the first part is run. I watch the approach of each tool anyways, so when I let the coolant go on I just enter the coolant offset as it begins its cut.

+1 too!

Also, just because you have a 3 inch long 1/2 inch endmill, there is a difference between a shallow cut on a piece of aluminum and pocketing out a piece of aluminum to 2 1/2 inches deep. So it is not always the same and are your operators going to assume all is good and walk away?

Anyway, a fun exercise.

Mike