2011/4/20 andy pugh <[email protected]>:
> On 19 April 2011 20:10, Viesturs Lācis <[email protected]> wrote:
>
>> I feel that we have misunderstanding here...
>> Alpha rotates around X (X stays, Z (and Y) are moved), theta - around
>> Z (Z stays, X (and Y) are moved). And theta goes first, alpha is
>> second.
>> So theta should move X to where Y was and then with alpha (by turning
>> around the "new" - already displace - X axis) Z would be placed, where
>> was X.
>> Please, take a look - I drew small sketch, how it is done in 2 steps:
>> http://www.cutting.lv/fileadmin/user_upload/DH.JPG
>
> After a few minutes of rotating my digital coordinate system I have
> concluded you are correct, it is easy to rotate your thumb to the
> index finger initial position with the two rotations. Also, all
> alignments appear to be possible, which you would rather expect,

I am hoping for a free weekend somewhere in a near future to sit down
and test this module by creating a single-joint virtual machine and
then trying to get the linear joint working correctly.
I will report my results back, when I will have something done.

Viesturs

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