Last October I posted some images of the Turnado radius turning attachment I had purchased from Gary Sneesby at Eccentric Engineering - https://metalworkforums.com/f65/t202...74#post1941874. I mentioned that I had also acquired the copy tracing attachment but hadn't built it. Well now I have along with the large radius shoe attachment but more importantly, building these attachments provided the momentum to tackle the more complex Acute.

The Turnado with its attachments -

Attachment 380521 Attachment 380522 Attachment 380523 Attachment 380524 Attachment 380525
Attachment 380526 Attachment 380527

And the Acute..

Attachment 380528 Attachment 380529 Attachment 380530 Attachment 380531 Attachment 380532 Attachment 380533

I won't bore you all with a zillion photos of their construction but I will point out a few things I learnt along the way. The most important is to never use a bent drill bit in an attempt to drill an accurately sized hole. One of the critically positioned holes in the Acute's workhead locates a locking pin to prevent the head's rotation. The arrow shows its position below. The hole was to be drilled 2.9mm and reamed 3mm. The bit I used was bent very slightly but I thought all would be well because it would be guided by the spot drilled hole. The 3mm reamer dropped through the hole and wobbled. Drilling the hole with a straight 1/8" bit resolved the wobble issue but took me very close to the edge.

tempsnip.png IMG_20190410_153507592.jpg

Most of the components hole locations have been CNC spot drilled. When I commenced work on the Turnado accessories I laboriously used the microscope to centre the holes and then drilled the holes by raising the mill's table.
In reality all the drilling could be accomplished using a reasonably accurate drill press with the items to be drilled clamped to its table. I resorted to using the 13's sensitive drilling attachment as well as the quilled high speed head neither of which facititate the use of the scope. I did clamp all but one item to the table. The unclamped item snagged and became a propellor!!. Many of the holes require tapping and having them remained clamped to the table provides a reasonable chance of concentricity along with verticality.

IMG_20190507_144357249_BURST000_COVER_TOP.jpg IMG_20190408_150017870 (Large).jpg IMG_20190414_122249928.jpg

The Turnado and Acute are wonderful examples of Gary Sneesby's ingenuity and inventiveness. I have to get on with modifying my GMF grinder to enable the attachment of the Acute to take advantage of that ingenuity and inventiveness.

Thank you Gary.

Bob.
Attached Images




Read the full thread at metalworkforums.com...