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Author Topic: Spiral Toolpath from Profile  (Read 11122 times)
Bubba
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« Reply #30 on: October 26, 2016, 16:44:22 pm »

Hi Eddy, Figure I jump in and test this thing.. The CB I'm using is the latest version and the OS is Win10. I got an error please see attached.. Hope it helps.. 


* Capture.JPG (93.55 KB, 1084x974 - viewed 67 times.)
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EddyCurrent
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« Reply #31 on: October 26, 2016, 16:52:57 pm »

Bubba,

Did you read the thread ?  Grin

You need a half profile something ike this; (almost like the lathe MOP)
It can't come back over on itself.


* Image2.jpg (75.82 KB, 800x567 - viewed 61 times.)
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Bubba
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« Reply #32 on: October 26, 2016, 17:06:33 pm »

Eddy,

you caught me.. Read only today's posts.. Embarrassed

So in other words this plugin would be good only for round pieces? I'm I understanding this right? The profile I have shown in my previous post its no go.. Wink
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EddyCurrent
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« Reply #33 on: October 26, 2016, 19:31:02 pm »

Bubba,

Not round pieces, but concave pieces that are in the shape of a dish or bowl.
I've attached an example cb file and a picture of how it looks, you have to rotate the view so you see it from the side.
What you see in red are the roughing toolpaths with the green outer one being the finishing pass.

Also you can see how it looks in CutViewer


* example1.jpg (93.77 KB, 800x508 - viewed 70 times.)
* example1.cb (1655.85 KB - downloaded 37 times.)

* Image4.jpg (41.01 KB, 800x608 - viewed 68 times.)
« Last Edit: October 26, 2016, 19:37:17 pm by EddyCurrent » Logged
dh42
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« Reply #34 on: October 26, 2016, 19:44:30 pm »

Hello,

maybe I've a way to do multipass + tool comp with endmill or ballnose with the plugin ... I'll upload a video in some minutes

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David
« Last Edit: October 26, 2016, 19:53:06 pm by dh42 » Logged
EddyCurrent
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« Reply #35 on: October 26, 2016, 19:44:41 pm »

I will look at it, but I think I can make the first version work for tapered thread milling.  Inside or outside.  Just have to account for all those pesky details.  

~~~~~  OH!  ~~~~~

I just realized the problem.  The increment is along the line.  Neither vertical nor horizontal isn't it? 

In order to use it for thread milling you need to do a little trig to get the proper increment. 

Bob,

It was never designed for and I'm sure it won't yield results for tapered thread milling.
If there is currently no other plugin for tapered thread milling then that might be something for the future.
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dh42
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« Reply #36 on: October 26, 2016, 19:58:14 pm »

Hello,

the video for tool compensation ; I think it should work ... to be tested Wink

https://www.youtube.com/watch?v=Z61TtblwRBE

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EddyCurrent
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« Reply #37 on: October 26, 2016, 20:13:41 pm »

David,

That is good thinking and a great video but I noticed you used version1 of the plugin, have you tried version2 here; http://www.cambam.co.uk/forum/index.php?topic=5420.msg48869#msg48869

I may have to look to see if your method can be done from inside the plugin.
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dh42
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« Reply #38 on: October 26, 2016, 20:27:51 pm »

Re

Just tried ; I do not get the same result with a TD = 6mm than with the method of the video.

I don't know ; the plugin compensate for an endmill or a ballnose ? (but in both cases there is a pb I think, because the Z position in the center of the shape is too high)

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David
« Last Edit: October 26, 2016, 20:42:34 pm by dh42 » Logged
dh42
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« Reply #39 on: October 26, 2016, 20:31:57 pm »

green line, the origin polyline without comp

white spiral, the toolpath with TD = 6 + ball nose obtained with the 3D mop

pink spiral, the toolpath with TD = 6 with V2 of the plugin

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David
 


* Sans titre-1.jpg (92.31 KB, 949x602 - viewed 76 times.)
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dh42
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« Reply #40 on: October 26, 2016, 20:41:01 pm »

another picture that show the tool position and the tool tip on the path

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David


* Sans titre-2.jpg (157.21 KB, 868x785 - viewed 252 times.)
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EddyCurrent
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« Reply #41 on: October 26, 2016, 21:19:02 pm »

I can see this is going to be another painful plugin  Cheesy
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dh42
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« Reply #42 on: October 26, 2016, 21:43:47 pm »

I'm working on a way to "calculate" the toolcomp on a VB script, if that work I share it and maybe you can explore this way ...
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Bubba
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« Reply #43 on: October 26, 2016, 22:06:47 pm »

Not round pieces, but concave pieces that are in the shape of a dish or bowl.
**********************

I miss-worded the "round part" sorry Eddy. Wink

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Bubba
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« Reply #44 on: October 26, 2016, 22:14:58 pm »

I will look at it, but I think I can make the first version work for tapered thread milling.  Inside or outside.  Just have to account for all those pesky details.  

~~~~~  OH!  ~~~~~

I just realized the problem.  The increment is along the line.  Neither vertical nor horizontal isn't it? 

In order to use it for thread milling you need to do a little trig to get the proper increment. 

Bob,

It was never designed for and I'm sure it won't yield results for tapered thread milling.
If there is currently no other plugin for tapered thread milling then that might be something for the future.

While back Lloyd wrote script called' Bottom-up Threading'.. Is there any way to adopt/marry it with your plugin to create Tapered thread milling? Or I'm way out in the left field with this.. again?.. Wink Cheesy Grin   
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