Gen5ax post question

[pkrzic]

I have a problem with configuring MPGEN_5x post.

 

The machine is Mikron UCP 710 with TNC 426 control (It does't support CYCLE19).

 

The machine looks like this:

 

 

My main problem is that the post doesn't calculate shifts when the part is rotating around primary ©axis. When it is rotating only around secondary (A) axis, the shifts are OK.

 

for instance I would like to put the part zero away from table center. To calculate the necessary shifts I use the parameters:

 

saxisx : 0 #The axis offset direction?

saxisy : 0 #The axis offset direction?

saxisz : 0 #The axis offset direction?

 

r_intersect : 0 #Rotary axis intersect on their center of rotations

 

Where the saxisx, saxisy and saxisz represent the posititon of tha part zero according to the table center.

 

The primari and secondary axis definitions are like this:

 

rotaxis1 = -vecy #Zero

rotdir1 = vecx #Direction

 

rotaxis2 = vecz #Zero

rotdir2 = -vecy #Direction

 

So, am I doing something wrong ?

 

All I want to do is that post would calculate shifts in the linear axis acoording to the rotation of both rotating axis (part zero is NOT in the tble center).

 

Thanks for the answers.

[crazy^millman]

Have you looked at the power point covering this post on the FTP in MISC/Txt/POSTS It gives alot of exaples on configuration for such things.

[pkrzic]

Of course, I've gone through this Power Point about 100 times, but there is no answer on how to make gen5ax working in such way that It would be possible to clamp a part outside of the table center.

[crazy^millman]

So what happens when you use this in your MISC varaiables:

code:

---

# mi6 - Add work shift position for rotation center programming

# 0 = Output relative to work origin (toolplane)

# 1 = Output relative to WCS origin (axis shifts)

---

or this:

code:

---

# mr7 - Axis shift for X axis, See 'shft_misc_r'

#

# mr8 - Axis shift for Y axis, See 'shft_misc_r'

#

# mr9 - Axis shift for Z axis, See 'shft_misc_r'

---

with this which you left out of your posting:

code:

---

#Axis shift  

shft_misc_r : 0 #Read the axis shifts from the misc. reals

#Part programmed where machine zero location is WCS origin-

#Applied to spindle direction, independent of RA

#Table/Table -

#Offset of tables to secondary axis relative to machine base.

#Tilt Head/Table - Head/Head -

#Part programmed at machine zero location-

#Offset in head based on secondary axis relative to machine base.

#Normally use the tool length for the offset in the tool direction

saxisx : 0 #The axis offset direction?

saxisy : 0 #The axis offset direction?

saxisz : 0 #The axis offset direction?

---

Seems to me this might answer your question but may not so I can only say keep trying or use the logic from here and do an logic of your own to add or subtract vaules for position based on the angles of rotation using some trig functions that the post posses.

 

Good luck and let us know if this points you in the right direction.

[Bruce Caulley]

No cycle 19!!!

 

How do you set a dynamic position?

 

I think Ron is on the right track. Good luck.

 

Bruce

[Lathe-Mill]

the company I work for is looking to buy a 5 axis machine, will someone please tell me what post will be the best to start from?. thanx.

[Brendan P]

quote:

---

the company I work for is looking to buy a 5 axis machine, will someone please tell me what post will be the best to start from?. thanx.

---

Not sure,but if you log in as a 'new member' you can ask for a free-bee 10 times before getting roasted!!

[chris m]

Carlos I think the machine builder and control will have a lot to do with that; are you going with another Okuma?

 

C

[Lathe-Mill]

chris, sorry i didn't answer your question earlier, right now every single machine builder in on the list, we are looking at a multitasking or multiaxis lathe, and so far i've seen that hardinge, okuma, morie seiki (websites), are the ones with such of machine, but if anyone out there has another machine company that makes one please let me know. thanx.

[chris m]

I wouldn't run a Hardinge if YOU paid for it; the machines [we have 2 'Super Precision' Conquest CNC lathes] are decent but the service is awful and the 'don't you realize we're HARDINGE?!?!' attitude can be a real PITA

 

C

[Ed Partlow Jr. from CNC Software]

pkrzik

 

quote:

---

Where the saxisx, saxisy and saxisz represent the position of the part zero according to the table center.

---

The saxisx, saxisy and saxisz values do not represent the part. They refer to the origin of the primary axis in relation to the origin of the secondary. The post needs this information to correctly compensate the X,Y, and Z positions when either axis rotates.

 

These values should be set during the initial configuration of the post and should never again need to be changed. For more details, take a look at the power point referred to by Crazy Millman.

 

I would never recommend making changes to a post on a job to job basis. That is not what a post is for.

 

When it comes to 5 axis programming, I always recommend that you draw your part in Mastercam exactly as you want it on the machine. If you will mount the part in the machine 2" over from center, then draw it in Mastercam 2" over from center.

 

----------------------

Ed Partlow Jr

[John Summers]

Use toolplane origin (TPLANE,alt-O) to move the toolpath origin to the center of the rotary table.