New Build - 'Audit' CNC - Lathe Attachment
Posted: Sun Jun 29, 2025 3:26 pm
It's very difficult to explain what this is. I've just bought 2 of them. One larger than the other. This video shows the unit best ...
These were made by a company and sold under the brand 'Audit'. Effectively its a 2 Axis clamp on Slant Bed lathe attachment meant to fit onto some Triumph / Colchester lathes. The straddle the saddle and then can be moved as needed along the bed. The smaller one I have has 10 inches of Z travel, the larger is 20 inches. I don't know the X distance but its massive.
We believe they were made for the oil industry where threading of long pipes was common place and these were used for a lot of the work.
The engineering that's gone into these is spectacular. They originally ran DC motors with 4.5NM torque. So on the AC servos side, I'd need around 1.5KW for similar performance unless I start to mess with pulleys / gears.
On top of each is a 8 tool Duplomatic ATC.
The weight of each of these is substantial. Even the small one cant be lifted by hand and needs a crane to lift.
I'm hoping I can get this mounted on my Harrison M300 which is starting to show its age and has some wear on the bed / cross slide.
So ye, Acorn or Acorn 6 for feedback .... feels like a waste of 4 axis however ...
The existing DC motors have incremental encoders on them and that would have given the original controls (which stands 6 feet tall) its feedback / control mechanism.
These were made by a company and sold under the brand 'Audit'. Effectively its a 2 Axis clamp on Slant Bed lathe attachment meant to fit onto some Triumph / Colchester lathes. The straddle the saddle and then can be moved as needed along the bed. The smaller one I have has 10 inches of Z travel, the larger is 20 inches. I don't know the X distance but its massive.
We believe they were made for the oil industry where threading of long pipes was common place and these were used for a lot of the work.
The engineering that's gone into these is spectacular. They originally ran DC motors with 4.5NM torque. So on the AC servos side, I'd need around 1.5KW for similar performance unless I start to mess with pulleys / gears.
On top of each is a 8 tool Duplomatic ATC.
The weight of each of these is substantial. Even the small one cant be lifted by hand and needs a crane to lift.
I'm hoping I can get this mounted on my Harrison M300 which is starting to show its age and has some wear on the bed / cross slide.
So ye, Acorn or Acorn 6 for feedback .... feels like a waste of 4 axis however ...
The existing DC motors have incremental encoders on them and that would have given the original controls (which stands 6 feet tall) its feedback / control mechanism.