I will pass this along to the FreeCAD path chat on gitter. I’m sure some people 
wouldn’t mind the info in here. There is a good chunk of work being done on the 
Path workbench but the feature freeze will slow things down as they try to 
stabilize it for the 0.19 release. 

-Thorhian

> On Feb 11, 2021, at 6:17 AM, Gene Heskett <[email protected]> wrote:
> 
> On Thursday 11 February 2021 07:17:20 andy pugh wrote:
> 
>>> On Thu, 11 Feb 2021 at 03:20, Bari <[email protected]> wrote:
>>> https://dspace.mit.edu/bitstream/handle/1721.1/29225/50140264-MIT.pd
>>> f
>> 
>> One of the better PhD theses I have read. (Not that I have read all of
>> it)
>> 
>> It is interesting to think back to what the state-of-the-art was in
>> 2001. I think that I was still using 2.5D AutoCAD Mechanical Desktop.
> 
> Makes me wonder if thats how toy was able to turn a block of alu into a 
> v8 engine block in about 4 hours as we saw in the since scrubbed from 
> u-tube video quite a few years ago. That machine was at least 6 axis 
> with a fully articulated head. Engine blocks only leased to TRO folks we 
> were told, issued as sealed engines you were not even authorized to 
> change spark plugs in.
> 
> With the patent now expired, I would be tempted to donate to the FreeCAD 
> folks if I knew they were working on it. It would be a huge feather in 
> our LinuxCNC hat if some sort of a co-operative arrangement that 
> resulted in compatible preprocess code we could use.
> 
> That, and affordable machines. Like a gantry mill with a swinging to the 
> side head, suspended between gantry arms to swing the whole head fore 
> and aft. But you won't buy that for 10 grand, enough rigidity to pull 
> that off will cost a lot more. That lack of rigidity is a problem with 
> my 6040 as there are certain places in cutting a circle out that can't 
> be done without visible chatter in the finish. It works pretty accuratly 
> as long as the depth of cut in alu is .25mm or less per pass. But thats 
> 10% of the DOC its capable of if it were rigid enough.
> 
> Cheers, Gene Heskett
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> 
> 
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