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5ax machine without RTCP, without plane tilting

Gears Phenom Gears Phenom
Gears Phenom

Hello,

I have a 5axis machine head-head AC kinematics. A+-110, C+-240.

head.JPG

 

What is the best practise to get correct output?

 

*I did it manually with some math to compensate mcs_goto X Y Z in case of rotating A and C.

( when A is titling Z must go down and X to left or right, etc...)

 

* Ive noticed that in PB are some parameters - pivot distance and rotary axes offsets.

When I set pivot distance and tool z offset I get some result in mom_pos but it was compensated only in tool axis direction.

 

*If there rotary axes center points offsets have some influence, how should I set it properly?

 

Do you have some suggestions on this topic?

 

Thank you

 

 

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#♫ PB, 5ax, itnc, nx, vericut ♫ #
6 REPLIES

Re: 5ax machine without RTCP, without plane tilting

Siemens Legend Siemens Legend
Siemens Legend

If you  are referring to these values? You would need to set them in both 4th and 5th axis. What ever the values are in 4th axis you need to set them the same in the 5th axis but opposite sign.  So if in 4th axis you have X 4.00 Y 3.00 Z 9.00 in the 5th axis you need to enter X -4.00  Y -3.00 Z -9.00.

ScreenHunter_01 Apr. 10 07.29.gif

Re: 5ax machine without RTCP, without plane tilting

Gears Phenom Gears Phenom
Gears Phenom

thanks

in my case rotary offsets are crossing itself. So I left there zeros.

 

But what about pivot distance and tool length?

When I set pivot distance and tool length z offset in tool:

 

N0040 G00 G90 Y-55.417 Z74.997 C-90. A-90. S650 M03
N0050 G43 X500.03 H00
N0060 X468.

Z  is wrong .

Z74 is tool tip hight. When you are turning head to A90, Z must go down(?)

111.jpg

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#♫ PB, 5ax, itnc, nx, vericut ♫ #

Re: 5ax machine without RTCP, without plane tilting

Legend
Legend
There are some Steps.
First design your machine and define the axis and components in the machine tool builder.
then pick the machine and create a postprocessor.
You got an PostConfigurator post.
In the property of this post disable RTCP and Plane output.

Done!!

Re: 5ax machine without RTCP, without plane tilting

Gears Phenom Gears Phenom
Gears Phenom

(Postbuilder, without machine model)

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#♫ PB, 5ax, itnc, nx, vericut ♫ #

Re: 5ax machine without RTCP, without plane tilting

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

I have a lot of released projects for postprocessor for "stuped" CNC without RTCP, like simple FANUC, MACH3, some "national domestic" CNC, for table-table, head-head or mixed kinematics.

Sample - 4-axis SYNTEC

Next sample - 5axis table-table

How it works?

May be I not so strong for PosbBuilder and Post Configurator - I cannot to get any results using offsets, pivots...

FOR COMMON case, I use 3 matrix transformation for any intersected or no-intersected rotary axis and calculate chain: (Tool Axis & Tool Tip)->(Aaxis or BAxis)->(Caxis)->(Poit for nc-output).

Usually I do it in before_motion.

Working......   

Re: 5ax machine without RTCP, without plane tilting

Gears Phenom Gears Phenom
Gears Phenom

@Chigishev

hi

It looks like my case

I did it in before motion with cos, sin, etc.

 

(Could you send me these matrices? If you want ofcourse)

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#♫ PB, 5ax, itnc, nx, vericut ♫ #

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