Probe part to align part and use G68

[MASTER B]

Can somebody give an example program to probe two holes on y axis to align and  use G68

[cncchipmaker]

Lets say your hole spread is 10 inches in X with .5 inch holes
We use 9914 for our hole pickup and #136 for our Y
absolute location:
T1M06(PROBE)
G0X-5.Y0
G43H1Z5.
G1Z-.2F50.
G65P9914D.5Q.1R.1
#600=#136
G0Z5.
X5.
G1Z-.2F50.
G65P9914D.5Q.1R.1
#601=#136
#602=[#601-#600]/2.
#530=ATAN[#602]/[5.]
IF[#530GT180.]THEN#530=#530-360.
G0Z5.
G91G28Z0
M00
G68#530
(WE USE #530 FOR ALL ROTATIONS)

[Machineguy]

What machine control?

Macros will vary in different controls.

[Grievous]

What if the real distance between holes is not actually 10.

T1M06(PROBE)
G0X-5.Y0
G43H1Z5.
G1Z-.2F50.
G65P9914D.5Q.1R.1

#600=#135 (X)
#602=#136 (Y)
G0Z5.
X5.
G1Z-.2F50.
G65P9914D.5Q.1R.1

#601=#135 (X)
#603=#136 (Y)

 

#605=#601-#600(X DIST BETWEEN HOLES)

#606=#603-#602(Y DIST BETWEEN HOLES)

#530=ATAN[#606]/[#605]

 

 

...ETC

...ETC

 

ps..1st probed hole is on left
 

[cncchipmaker]

What if the real distance between holes is not actually 10.

T1M06(PROBE)

G0X-5.Y0

G43H1Z5.

G1Z-.2F50.

G65P9914D.5Q.1R.1

#600=#135 (X)

#602=#136 (Y)

G0Z5.

X5.

G1Z-.2F50.

G65P9914D.5Q.1R.1

#601=#135 (X)

#603=#136 (Y)

 

#605=#601-#600(X DIST BETWEEN HOLES)

#606=#603-#602(Y DIST BETWEEN HOLES)

 

#530=ATAN[#606]/[#605]

 

 

...ETC

...ETC

 

ps..1st probed hole is on left

 

I am assuming the 10.00 would be known and precisely machined. I am not sure if your example would work because if you took a 10.00 hole spread and kicked it at lets say 10. degrees the hole spread would still be 10. inches. I will have to think about it some more and maybe come up with some more math that would take into account all aspects of the holes. Great point though. Thank You.

[Grievous]

I think the idea is that if u have 2 holes machined precisely at a certain distance in a previous operation and you want to use them to align your part in a next operation, it not necessarily mean that they will be aligned along one direction(almost impossible to align them by eye). I'm guessing he's asking to align a part between 2 holes machined in a prev operation and just put the part on the table as close to the desired position and pick up the misalignment with the probe. If in his setup those 2 holes needs to be aligned along Y axis then he needs to take 90 from the resulting angle. It all depends on how those holes are in his setup.

That's why as a rule you need to find the actual displacement on X and Y between holes, and use with ATAN formula, because it's practically impossible to put the part by eye on the table and the holes to be in the desired alignment. Then from here many scenarios can spawn depending on where those holes needs to be, maybe they are at 45deg( in I don't know what scenario).

[cncchipmaker]

I think the idea is that if u have 2 holes machined precisely at a certain distance in a previous operation and you want to use them to align your part in a next operation, it not necessarily mean that they will be aligned along one direction(almost impossible to align them by eye). I'm guessing he's asking to align a part between 2 holes machined in a prev operation and just put the part on the table as close to the desired position and pick up the misalignment with the probe. If in his setup those 2 holes needs to be aligned along Y axis then he needs to take 90 from the resulting angle. It all depends on how those holes are in his setup.

That's why as a rule you need to find the actual displacement on X and Y between holes, and use with ATAN formula, because it's practically impossible to put the part by eye on the table and the holes to be in the desired alignment. Then from here many scenarios can spawn depending on where those holes needs to be, maybe they are at 45deg( in I don't know what scenario).

Looking at my math again I believe you are right. Sometimes I get in a hurry when I write this stuff then prove it out and debug at the machine. My 10. spread would be the hypotenuse of the triangle and would not be included in an ATAN calculation so I believe you are correct. How would we then incorporate positive or negative rotation?

[Whatchagot]

The top y (or x)greater than the bot y(or x) R+ , go to #100

The top y less than the bot y=R-,got on #101

Reverse sign if using mirror

[Whatchagot]

I store angle in a non- volatile variable in case the power goes out like #500 and up

I built a program ( macro) that calculates the angle using tha ATAN function , as you are correct, and use it almost everyday

To reset up parts and there is no blemish lines if probe is recently calibrated. Hope this helps without posting the actual macro program in an open forum