PCool Position Question

[behindpropeller]

I need some advice on my PCool.

Right now my current post for my cam has the PCool move into position when it starts feeding.

The problem with this is that often I will have a chuck with a drill in it... well the PCool does not orient right away so when the tool is turned on at the spindle change position and the coolant sprays all over the place.

Thanks.

Tim

[Machineit]

Don't know your post, but check to make sure the coolant is being turned off before the tool change. If is not, it will turn off during the change but immediately come back on upon completion and is messy.

So look for that M09 before the tool change. If the program is being posted by a cadcam system make sure that it has the proper code to turn the coolant off.

Good luck---Mike

[behindpropeller]

The coolant is being turned off before the toolchange.

[Machineit]

I should add that on every Pcool machine I have run, the coolant will not come on until the unit is in position, so again make sure it is turned off first.

Mike

[Donkey Hotey]

The post has nothing to do with the P-cool. The machine orients the P-cool when the coolant is activated. The only way to have the P-cool orient before cutting would be to add a dwell to your post, right after the Coolant-on line. Probably more trouble than it's worth.

I just point the fixed nozzles in the general direction and let them do the job until the P-cool catches up.

[behindpropeller]

Originally Posted by Donkey Hotey The post has nothing to do with the P-cool. The machine orients the P-cool when the coolant is activated. The only way to have the P-cool orient before cutting would be to add a dwell to your post, right after the Coolant-on line. Probably more trouble than it's worth. I just point the fixed nozzles in the general direction and let them do the job until the P-cool catches up.

Hey thanks.

With the open TM2 its not the problem of the coolant getting to the work but the coolant spraying all over the room when the pcool is aimed high.

Tim

[WallyL7]

Yeah - I was going to be jealous that your post puts out the coolant nozzle position...I figured you had a pretty cool macro built for that since I've never seen a code for it.

Just make sure that your M9 is called before the line that has the M6 on it - so the coolant is good and off before it moves home.

Then make sure that your M8 is called on a line that gets your spindle down a ways from home. As long as it comes on quickly, you can normally call it on your G43 H7 Z?? M8 line. That way the coolant comes on after the spindle has moved down from home to wherever you like to start the -Z- at.

[KenFoulks]

Here is an article on the Haas @ Your Service Blog:

Haas Machining Centers: Using the Programmable Coolant Nozzle | Haas

Also, the pcool should adjust position on the G43 line. If you command the M08 after the G43, the pcool should be in position before it turns on.

[behindpropeller]

Here is my code:


I'll read Ken's link now.

O00001 (Bottom Holes Tapped)
(T4 D=0.3735 CR=0. - ZMIN=-0.73 - flat end mill)
(T6 D=0.125 CR=0. - ZMIN=-0.3975 - flat end mill)
(T10 D=0.058 CR=0.0625 - ZMIN=-0.0656 - radius mill)
(T15 D=0.5 CR=0. TAPER=118deg - ZMIN=-1.2302 - drill)
N10 G90 G94 G17
N15 G20
N20 G28 G91 Z0.
N25 G90
N30 T15 M6
N35 T4
N40 S900 M3
N45 G54
N50 M8
N55 G0 X0. Y0.
N60 G43 Z0.4 H15
N65 G17
N70 G0 Z0.2
N75 G98 G83 X0. Y0. Z-1.2302 R0.2 Q0.125 P0 F20.
N80 G80
N85 Z0.4
N95 G28 G91 Z0.
N100 G90
N105 M9
N110 M1
N115 T4 M6
N120 T6
N125 S4000 M3
N130 M8
N135 X-0.2497 Y-0.8368
N140 G43 Z0.4 H4
N145 Z0.2
N150 G1 Z0.1 F20.
N155 X-0.65 Z0.093 F50.

[KenFoulks]

Change the M08 to line N70.

[Machineit]

Originally Posted by Donkey Hotey The post has nothing to do with the P-cool. The machine orients the P-cool when the coolant is activated. The only way to have the P-cool orient before cutting would be to add a dwell to your post, right after the Coolant-on line. Probably more trouble than it's worth. I just point the fixed nozzles in the general direction and let them do the job until the P-cool catches up.

I hope you didn't think that I was saying to check the post for P-cool setting, I was not. Just to make sure the post was turning the coolant off prior to tool change.

Also the P-cool location is not changed when the coolant is activated, it is changed when the tool is changed with the MO6 and the offset is called up. It will adjust even if you never put in an MO8.

Cheers all---Mike

[Matt@RFR]

Wow, usually everyone is in agreement with their advice, but it's all over the place on this topic! I wonder if the way the Pcool works is dependent on software version?

On my '07, M8 and M9 have NOTHING to do with when the Pcool positions. It positions when G43 Hhh is called, no sooner, no later. To prove this, type G43 Hhh in MDI and the Pcool should move when cycle start is pressed. Here's how my post is set up:

M6 T1
M3 S12000
G43 H1 M8
G0 X0. Y0. Z.25
--------------------
G0 Z.25
G20 G40 G80 G90

M6 T2
ETC.

Notice no M9? The way that code runs is the Pcool is moving to position DURING the first axis moves so, generally, it's in position before the first cut is taken.

Originally Posted by WallyL7 Yeah - I was going to be jealous that your post puts out the coolant nozzle position...I figured you had a pretty cool macro built for that since I've never seen a code for it.

It's easy. Variables 3401-3600 store Pcool position for tools 1-200. So if you want to hand code it, it's as simple as:

M6 T1
M3 S12000
#3401=6 (Pcool position set to 6 for T1)
G43 H1 M8
Etc.

Or if you'd like to automate it a bit:

IF[#2001 GT 3. LT 3.6] THEN #3401 = 4

This writes 4 to T1 pcool position if the measured tool length is between 3.0 and 3.6.