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Author Topic: True 4 axis milling  (Read 32471 times)

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Offline docltf

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Re: True 4 axis milling
« Reply #20 on: July 19, 2010, 03:39:11 PM »
you can take a look at this freeware called - cnc toolkit - .it is a pain to sign up for but it is free.
might be what you need to get going.they work on it all the time.

bill

Offline khalid

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Re: True 4 axis milling
« Reply #21 on: July 19, 2010, 03:53:29 PM »
Yaa i have seen it and worked with it..but it is difficult;)

Offline docltf

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Re: True 4 axis milling
« Reply #22 on: July 19, 2010, 06:03:19 PM »
it might not be that bad for brian since he is new at this.he will take a few lumps up front learning the package.but in the
longrun he might come out ahead of the curve.they add to it every week and it has plenty of options.the stuff it can import
is pretty impressive.

bill

Offline BR549

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Re: True 4 axis milling
« Reply #23 on: July 20, 2010, 12:19:20 AM »
To do what you want to do it takes 5 axis not 4 (;-)

4th axis work is basically 3 axis WORK as IF you move the spindle OFFcenterline of the rotary then your cutting is offset from the rotary axis  and difficult to do and mostly NOT neccesary as you will get the same results from just the 3

Just a thought,(;-)

Offline khalid

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Re: True 4 axis milling
« Reply #24 on: July 20, 2010, 12:40:14 AM »
A little apprehension on this "4th axis work is basically 3 axis WORK "..
A true 4th axis work is actual 4th axis work includes simultaneous movements of all 4-axis...

Offline BR549

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Re: True 4 axis milling
« Reply #25 on: July 20, 2010, 07:48:15 PM »
MUMMMM don't think so(;-), Think about the relationship of all 4 axis. ONE of the XY axis has to remain on the rotary axis centerline to make cutting senseable. AND you gain nothing by moving off of it.

Now IF you are 3 axis plus 4th indexing then you have 3 1/2axis control. But cutting is still 3 axis. Even 3d 4th is still 3 axis movement. Maybe a 4 axis where the 4th is atrunnion on the spindle. But never saw one that did not have the 5th as well.

I don't every recall seeing a true 4 axis machine that was not a 5 axis control. But I could be wrong. (;-)
« Last Edit: July 20, 2010, 07:50:53 PM by BR549 »

Offline docltf

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Re: True 4 axis milling
« Reply #26 on: July 20, 2010, 09:12:43 PM »
BR549

i do a 4 axis part that has to move off the centerline of x & y in order for it to work.
XYZA all have to be in motion to make the cut.it is a pretty neat looking cut when it is
finished.when you look down the nose it looks like the bow of a boat.


bill

Offline BR549

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Re: True 4 axis milling
« Reply #27 on: July 20, 2010, 10:24:10 PM »
It would be interesting to see a picture of your setup.
Re: True 4 axis milling
« Reply #28 on: July 21, 2010, 02:53:36 AM »
you can take a look at this freeware called - cnc toolkit - .it is a pain to sign up for but it is free.
might be what you need to get going.they work on it all the time.

bill

Thanks for that Bill, I will look into this.

brian
Re: True 4 axis milling
« Reply #29 on: July 21, 2010, 02:58:17 AM »
To do what you want to do it takes 5 axis not 4 (;-)

4th axis work is basically 3 axis WORK as IF you move the spindle OFFcenterline of the rotary then your cutting is offset from the rotary axis  and difficult to do and mostly NOT neccesary as you will get the same results from just the 3

Just a thought,(;-)



My rotary 4th axis will be mounted at 90deg to the XY plane and its axis is in line with the X axis. With Meshcam it can only really be used as a convenient way of orientating the stock and as far as I can tell will not move whilst cutting.