Right Angle Head Code Generation

[Cory M. Pio]

Hello Guys,

 

So I was beating my head against the wall on a way to use my stock post to generate code for milling a circular boss with a right angle head.

 

AND THAN I remembered my good friend Parallel to Surfaces toolpath. Now I set my plane to the correct angle for my RAH to approach and voila...

 

I will have to create dummy geometry to drive the correct center line offset and for my tool diameter.

 

Can anyone help me find a flaw in this process? Has anyone tired this method before?

 

I'm thinking that I might be overlooking something stupid here! 

 

Hopefully, this will work , because I'm thinking we could use it for surfacing also if you get creative with it. 

[Cory M. Pio]

Here's the code...

Looks Good to me.

Thinking about it MORE. I should be good to go with cutter comp in my hurco post with tool center point.

 

 

%

O0000 (ASM_CORY)

(T5 | 0.25 ENGRAVING BIT | H5 | D5 | D0.2500" | | NULL.......)

M31

M126

G0 G17 G20 G40 G80 G54 G90

G0 M140

G53 Z0.

G0 X0. Y0. A0. C0.

(TOOLPLANE NAME - BACK)

T5 M6 (0.25 ENGRAVING BIT)

G54

G8.1

X0. Y0. I0.000000 J1.000000 K0.000000

M128 (TCPM ON)

X-.1199 Y6. I0.000000 J1.000000 K0.000000

Z-2.3286 I0.000000 J1.000000 K0.000000

G8.2

G43.4

M13

M33

Y-3.3735 I0.000000 J1.000000 K0.000000

Y-3.7735 I0.000000 J1.000000 K0.000000

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X.3339 Y-4.2869 Z-2.3286 I0.000000 J1.000000 K0.000000

Y-3.8869 F50. I0.000000 J1.000000 K0.000000

G0 Y-3.4869 I0.000000 J1.000000 K0.000000

Y6. I0.000000 J1.000000 K0.000000

G0 M140

M129 (TCPM OFF)

G53 Z0.

M5

G53 Y16. A0. C0.

M30

%

 

[Colin Gilchrist]

There is nothing inherently wrong with your approach, but you're creating extra work for yourself. For 3X and 4X posts, you can support a RAH attachment by using the features inside the Machine and Control Definition files. You create a RAH attachment and the "Station" definition, by adding the components to the Kinematic Tree inside the MD. Support for the code output is enabled in the Control Definition by turning on the check box for 'support RAH by translating NCI coordinates'.

 

The Aggregate component and 'station' definition have parameters for the 'Z offset' length, and the radial offset from the spindle centerline to the tool tip. By translating the NCI coordinates, you can program with a Front, Right, Back, or Left Toolplane, and the path gets converted into "Top" output.

 

When you program a RAH toolpath you Right-click in the Tool parameters dialog, and select 'get angled head'. Program your path like normal and the MD/CD handle the rotation and translation internally, without you needing to make extra modifications to your post.

 

Do a search on the forum, this subject has been covered several times before and there is good info available.

[Guest]

Your G68.2 needs an X, Y, Z, I, J, and K

[Guest]

Your G68.2 needs an X, Y, Z, I, J, and K

[jlw™]

Am I missing something?  I see not a G68.2.

[Cory M. Pio]

There is nothing inherently wrong with your approach, but you're creating extra work for yourself. For 3X and 4X posts, you can support a RAH attachment by using the features inside the Machine and Control Definition files. You create a RAH attachment and the "Station" definition, by adding the components to the Kinematic Tree inside the MD. Support for the code output is enabled in the Control Definition by turning on the check box for 'support RAH by translating NCI coordinates'.

 

The Aggregate component and 'station' definition have parameters for the 'Z offset' length, and the radial offset from the spindle centerline to the tool tip. By translating the NCI coordinates, you can program with a Front, Right, Back, or Left Toolplane, and the path gets converted into "Top" output.

 

When you program a RAH toolpath you Right-click in the Tool parameters dialog, and select 'get angled head'. Program your path like normal and the MD/CD handle the rotation and translation internally, without you needing to make extra modifications to your post.

 

Do a search on the forum, this subject has been covered several times before and there is good info available.

This is for five axis machines and I don't feel like jumping though hoops with the post.

 

I believe it will allow me to use a right angle head with any stock post? 

 

I probably have 20 hours into reading about rah on this site and all of it lead to people voicing there fustration with it all. 

 

This solution wasn't presented in any of the other threads that is why I started a new one!

[Cory M. Pio]

Your G68.2 needs an X, Y, Z, I, J, and K

This is an inhouse hurco post. 

 

your right that code is no good. HA 

 

apparently, when you set an advanced 5-axis path to output 3axis it gets all wonky.

 

This code is correct... It transforms like a g68.2 after the M128 based on the A / C move. 

O0000 (ASM_CORY)(MASTERCAM - X)(POST LIC  -  IN-HOUSE SOLUTIONS )(T5  | 0.25 ENGRAVING BIT        | H5  | D5  | D0.2500" |         | NULL.......)M31M126G0 G17 G20 G40 G80 G54 G90G0 M140G53 Z0.G0 X0. Y0. A0. C0.(TOOLPLANE NAME - BACK)T5 M6 (0.25 ENGRAVING BIT)G54G8.1X0. Y0.M128 (TCPM ON)A90. C0.X-.1199 Y6.G43 Z-2.3286 H5G8.2M13M33Y-3.3735Y-3.7735G1 Y-4.1735 F25.X-.1239 Y-4.189 Z-2.3411 F3.34X-.1297 Y-4.2169 Z-2.3634X-.1335 Y-4.2455 Z-2.3853X-.1355 Y-4.2745 Z-2.4069X-.1356 Y-4.3041 Z-2.4278X-.134 Y-4.3341 Z-2.4479X-.1307 Y-4.3647 Z-2.467X-.1257 Y-4.3957 Z-2.485X-.1193 Y-4.4271 Z-2.5018X-.1115 Y-4.4589 Z-2.5172X-.1025 Y-4.4911 Z-2.5311X-.0923 Y-4.5236 Z-2.5434X-.0811 Y-4.5563 Z-2.554X-.0691 Y-4.5893 Z-2.5627X-.0564 Y-4.6225 Z-2.5696X-.0432 Y-4.6559 Z-2.5746X-.0297 Y-4.6893 Z-2.5776X-.016 Y-4.7228 Z-2.5788X0. Y-4.7274X.0141 Y-4.7321X.0261 Y-4.7368X.0382 Y-4.7421X.0504 Y-4.748X.0626 Y-4.7547X.0749 Y-4.7621X.0871 Y-4.7703X.1052 Y-4.784X.1215 Y-4.7982X.1372 Y-4.8141X.1522 Y-4.8315X.1662 Y-4.8504X.179 Y-4.8709X.1904 Y-4.8927X.2003 Y-4.9157X.2046 Y-4.9276X.2084 Y-4.9398X.2117 Y-4.9519X.2145 Y-4.9642X.2168 Y-4.9766X.2186 Y-4.9892X.2199 Y-5.0018X.2207 Y-5.0145X.221 Y-5.0273X.2208 Y-5.04X.2188 Y-5.0649X.2149 Y-5.0895X.2092 Y-5.1134X.2017 Y-5.1366X.1946 Y-5.1543X.1865 Y-5.1713X.1776 Y-5.1875X.1679 Y-5.203X.1576 Y-5.2176X.1409 Y-5.2378X.1232 Y-5.2561X.1048 Y-5.2723X.0859 Y-5.2866X.0667 Y-5.2989X.0475 Y-5.3094X.0281 Y-5.3184X.0089 Y-5.3257X-.0098 Y-5.3315X-.0279 Y-5.336X-.054 Y-5.3405X-.0785 Y-5.3426X-.095 Y-5.343X-.1087 Y-5.3427X-.122 Y-5.3419X-.1357 Y-5.3405X-.1499 Y-5.3384X-.1646 Y-5.3355X-.1796 Y-5.3317X-.2029 Y-5.3243X-.2172 Y-5.3188X-.23 Y-5.3131X-.2429 Y-5.3066X-.2559 Y-5.2994X-.2689 Y-5.2913X-.2818 Y-5.2824X-.3008 Y-5.2673X-.3177 Y-5.2517X-.3266 Y-5.2426X-.3352 Y-5.233X-.3435 Y-5.2228X-.3515 Y-5.2122X-.3592 Y-5.2011X-.3664 Y-5.1895X-.3733 Y-5.1775X-.3793 Y-5.1657X-.3846 Y-5.1543X-.3894 Y-5.1425X-.3939 Y-5.1305X-.3978 Y-5.1182X-.4013 Y-5.1057X-.4042 Y-5.093X-.4067 Y-5.0801X-.4097 Y-5.0568X-.411 Y-5.0314X-.4102 Y-5.0059X-.4074 Y-4.9807X-.4026 Y-4.9559X-.3984 Y-4.9398X-.3905 Y-4.9162X-.3809 Y-4.8937X-.3699 Y-4.8723X-.3574 Y-4.8523X-.3429 Y-4.8324X-.3272 Y-4.8141X-.3108 Y-4.7976X-.2937 Y-4.7828X-.2819 Y-4.7737X-.2699 Y-4.7653X-.2578 Y-4.7577X-.2458 Y-4.7509X-.2337 Y-4.7447X-.2217 Y-4.7392X-.2099 Y-4.7343X-.1864 Y-4.7263X-.1636 Y-4.7203X-.1417 Y-4.7163X-.1208 Y-4.714X-.0974 Y-4.713X-.0822 Y-4.7132X-.0683 Y-4.714X-.054 Y-4.7155X-.0391 Y-4.7178X-.016 Y-4.7228X.0119 Y-4.6997 Z-2.5776X.0395 Y-4.6765 Z-2.5746X.0669 Y-4.6533 Z-2.5696X.0937 Y-4.63 Z-2.5627X.1198 Y-4.6065 Z-2.554X.145 Y-4.5828 Z-2.5434X.1693 Y-4.5589 Z-2.5311X.1924 Y-4.5348 Z-2.5172X.2143 Y-4.5104 Z-2.5018X.2347 Y-4.4857 Z-2.485X.2536 Y-4.4606 Z-2.467X.2709 Y-4.4352 Z-2.4479X.2865 Y-4.4094 Z-2.4278X.3002 Y-4.3833 Z-2.4069X.3122 Y-4.3567 Z-2.3853X.3222 Y-4.3298 Z-2.3634X.3303 Y-4.3024 Z-2.3411X.3339 Y-4.2869 Z-2.3286Y-3.8869 F50.G0 Y-3.4869Y6.G0 M140M129 (TCPM OFF)G53 Z0.M5G53 Y16. A0. C0.M30%

;

;

;

;

;

 

This is the generic post... see the z/y moves for the right angle head tool interpolating a bore?

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[jlw™]

I recently set up 2 different 5 axis posts and a 3 axis post to run an angle head. I beat my face on my keyboard until Colin pointed me in the right direction. You an do it your way and literally fight it and make hand edits forever or take the 8 minutes to create an aggregate and move on.

 

 

Totally up to you.

[Cory M. Pio]

I recently set up 2 different 5 axis posts and a 3 axis post to run an angle head. I beat my face on my keyboard until Colin pointed me in the right direction. You an do it your way and literally fight it and make hand edits forever or take the 8 minutes to create an aggregate and move on.

 

 

Totally up to you.

okay can you point me to a thread that could help me out? i would greatly appreciate it. 

 

How many hours did it take to setup?

 

I have a possible job with two boss on a vertical wall. 

[Mick]

On ‎6‎/‎11‎/‎2016 at 4:43 PM, jlw™ said:

I recently set up 2 different 5 axis posts and a 3 axis post to run an angle head. I beat my face on my keyboard until Colin pointed me in the right direction. You an do it your way and literally fight it and make hand edits forever or take the 8 minutes to create an aggregate and move on.

 

 

Totally up to you.

Hi Jeremy,

 

What is involved in configuring a 3 axis post to support an angled head? I've just had a customer enquire about this, and I'd like to be able to help them out.

[jlw™]

I'll be glad to help you out.  It's actually much easier than you'd think.  Send me an email.

[David Colin]

Hi,

I dig up this topic as i'm in the process to setup a RAH on a VMC. I followed what JLW wrote here to tweak my MD and CD files. My toolpath and code look good.

However, backplot/post points are generated from tool tip and i'd like it to be output from center spindle. I thought station parameters could be used to do it but it seems that whatever i put in these fieds have no effect.

Any ideas?

 

[nickbe10]

On ‎11‎/‎5‎/‎2016 at 7:01 PM, Colin Gilchrist said:

By translating the NCI coordinates, you can program with a Front, Right, Back, or Left Toolplane, and the path gets converted into "Top" output.

 

On ‎11‎/‎5‎/‎2016 at 8:43 PM, jlw™ said:

I recently set up 2 different 5 axis posts and a 3 axis post to run an angle head. I beat my face on my keyboard until Colin pointed me in the right direction.

Mornin' Gentlemen,

So as I recall this is one of the few places where you can use different Tool and Construction planes. How does this tie in with this techniques, or are we talking about a different approach?

I remember playing one day and got good tool motion on the screen (But it ran great on the screen!!) threadmilling a tube in a vertical 4 axis  using Top Construction and Right Toolplane.

Does this also require the Aggregate head to make it post good code?

[David Colin]

Here i'm working with Top WCS, and left Cplane/Tplane.

Checking "Translating NCI coordinates" in control definition will correctly post mapping Z-axis Tplane -> X-axis Top WCS / Y-axis Tplane -> Z-axis Top WCS.

2D contour toolpath doesn't regen if i'm using Top WCS/Top Cplane/Left Tplane

[Colin Gilchrist]

4 hours ago, nickbe10 said:

 

Mornin' Gentlemen,

So as I recall this is one of the few places where you can use different Tool and Construction planes. How does this tie in with this techniques, or are we talking about a different approach?

I remember playing one day and got good tool motion on the screen (But it ran great on the screen!!) threadmilling a tube in a vertical 4 axis  using Top Construction and Right Toolplane.

Does this also require the Aggregate head to make it post good code?

Hi Nick,

We should do one of our training sessions on this soon. The short answer is that for most applications, your T/C Planes would still match. There are a few situations where you could have a difference between the T Plane and the C Plane. Having different planes was more common (necessary) when there were fewer Toolpath Options in Mastercam.

I worked on a project with V9, where a customer had an auxiliary motor mounted to the Z-Axis head stock. This motor had a spindle arbor that stuck out, and had a 6" diameter wheel cutter, .750 thick, with a full radius. (Slot Cutter, full .375 rad). He was using this tool to hog out wood, for making guitar necks. We used Finish Parallel, with "Top" Construction Plane  (this is how the algorithm 'slices' the surfaces), and used the "Right" Tool Plane. The spindle axis is aligned with X, but the machine still has standard XYZ right-hand coordinate system. So we used the "aggregate head" functionality in Mastercam to handle the NCI Translation. You have to configure the correct "offset distances" in the Aggregate Head Component/Station. It works slick when you set it up correctly, and is one of the few places where using the Machine Definition functionality provides some real benefit.

[nickbe10]

22 minutes ago, Colin Gilchrist said:

The spindle axis is aligned with X, but the machine still has standard XYZ right-hand coordinate system. So we used the "aggregate head" functionality in Mastercam to handle the NCI Translation.

So just to clarify a little, C and T planes to configure the machine (or reconfigure it in the above example) and aggregate head to tanslate the code, am I understanding this correctly?

[Colin Gilchrist]

On 3/30/2018 at 2:36 PM, nickbe10 said:

So just to clarify a little, C and T planes to configure the machine (or reconfigure it in the above example) and aggregate head to tanslate the code, am I understanding this correctly?

I think so, but it is always easier for me to try and demonstrate it, instead of just discussing it.

[DUM1]

did a little test program and it looks lide it could work ok ,,, have not tested it on the machine just kind of followed Colin's lead, good luck

RIGHT ANGLE TEST.mcx-9

[David Colin]

Yes, that works ok but I still wonder what can be done with 'station parameters (tool offset/X-Y-Z offsets)' as they have no effect on toolpath or post generation.

I thought these parameters could be helpful for my machine (an old VMC Mazak) as i can't define a RAH tool type in control and i can't set X/Y tool offsets so i need toolpath be generated at center spindle.

Well i guess i'll need to hand edit code...

[jlw™]

David, is this a Fusion control?

How about turning on "crank tool?"

If you need to know how I'll send the info.

[David Colin]

This is a pretty old M32 control.

What is crank tool? 

[jlw™]

Where the control allows you to use cutter comp properly with an angle head.  I believe some of those had crank tool.  I can send you what I have and then you can take a look if you're inclined to do so.  A call to Yamazaki should let you know real quick if your machine has it or not.

[Colin Gilchrist]

8 hours ago, David Colin said:

Yes, that works ok but I still wonder what can be done with 'station parameters (tool offset/X-Y-Z offsets)' as they have no effect on toolpath or post generation.

I thought these parameters could be helpful for my machine (an old VMC Mazak) as i can't define a RAH tool type in control and i can't set X/Y tool offsets so i need toolpath be generated at center spindle.

Well i guess i'll need to hand edit code...

Have you enabled "Translate NCI Coordinates" switch inside the Control Definition, and then done a "REPLACE" on the whole MD/CD/PST combination, inside your Mastercam File, and.... then you Regenerated all Toolpaths "Fully", and made sure you selected a "station/tool" combination inside each Operation's "Tool Selection" dialog (you right clicked and used "get station" or "get angled head" option???).

There is a certain sequence of defining each "Station". You do this inside the Machine Definition Manager, to be able to set the XYZ offset distances.

The "Translate NCI Coordinates" switch, when enabled, and having everything (Ops, MD/CD/PST, Tool Selection) done correctly, you should see those XYZ offset values applied to your NC XYZ code values.

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

There are also kind of "two distinct" modes of running a RAH. Are you wanting the XYZ values to represent the "Tool Tip" position, or the "Spindle Gauge Point", which has an offset from the tip of the tool?

For using "Tool Tip", we typically setup the "G43" Tool Length Offset, to hold the distance in "Z" from the Spindle Gauge Point, to the centerline of the tool (in the RAH). This functions just like G43 normally does.

But in addition to "G43" for length, we also use the Fanuc Style "G45/G46" offset function, (along with a X or Y position, to indicate the Axis that is being offset. This function is a "Stroke Offset" function, and is used along with a "D" value, to handle the offset in X or Y, from the spindle gauge point, to the tip of the tool.

So, using G43 H#, in combination with G45/G46 with a D# (either one, depending on axis and direction), lets you program "from the tool tip".

Now, in combination with the "Position offsets" for Tool Tip Programming, If we use the correct WCS / T Plane / C Plane combination, we can still get either G19 or G18 Arc Motion, with our G2/G3, and we can still use Cutter Compensation G40/G41/G42, on these ZX or YZ Planes!

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

If we aren't using "Tool Tip" programming, then we've got to account for the RAH unit, using the XYZ offset values, in the "Station / Tool" definition, and have the Post offset our tool tip value, by the distances entered. We also have to figure out what method we are using for Tool Length Comp, and possibly still use H/D values to account for changing tool lengths. Some of that will depend on the Tool Mounting Method you are using, and how often you need to change tools. Also, what method you are using to initially set the tools up, and what happens when you have to change a tool? There are some options you can use to "offset" the tool at the machine, otherwise you are stuck with "measuring every time", and posting out a new NC Code Program if you have to make changes, and there is no "offset" functions available on your control.

 

 

 

[David Colin]

Hi Colin, thank you for the extra info.

I think I followed the correct process to set MD/CD as I tried and retried several times. Toolpath looks good, post translates NCI spitting G19 and arcs. Only issue is offsets are not taken into account in Mastercam (neither translated in NCI) except 'machine view  safe height' which is correctly added to toolpath. I will retry again.

About programming method I'd like to program at tooltip but I didn't know about G45/G46 compensation so I will check if M32 controller has this feature built-in and my issues will be gone. However if it's not there I will have to post from spindle gauge point. Reading again your reply I perhaps misunderstood: Does post need to be tweaked to calculate these points taking account offset values in station parameters? I mean, does Mastercam should do it on its own internally or not?