Stirling
Hot Rolled
- Joined
- Dec 11, 2013
- Location
- Alberta canada
Machine is a 2005 tl-1 with a c series multiflex quick change tool post.
Boring a 0.8625-0.8635" hole 0.75" deep with a 0.5" diameter bar with a c series cutter. Bar has 1.25" pullout. (Has to be out this far due to part/carriage clearance)
Part starts as a 6061 blank 10" dia with a 0.47" hole in. Centre, and gets 10 min of facing cuts to profile the front of part. (Ya ya, the tl has no balls) then a quick boring cycle. 1400 rpm 0.018"per rev 0.05" depth, a 0.01" at 0.004/rev finishing pass followed by a spring pass.
I've had great luck and made lots of these parts in the past with consistant boring. Now I am chasing an offset that keeps moving around by 0.02", totally random seeming.
Tool post and holder is very clean every time. I've put a dial on the tool tip mounting the mag base to the frame of the machine. Pushed pulled, repeatedly placed and locked tool. Repeats within tenths and no loose Components.
What gives? Tips tricks, am I blindly missing something??
Machine had a pretty bad crash a while back. But the run after on some small 4140 pins repeated within 0.0003" non problem.
Thanks for reading my novel and any input you have
Boring a 0.8625-0.8635" hole 0.75" deep with a 0.5" diameter bar with a c series cutter. Bar has 1.25" pullout. (Has to be out this far due to part/carriage clearance)
Part starts as a 6061 blank 10" dia with a 0.47" hole in. Centre, and gets 10 min of facing cuts to profile the front of part. (Ya ya, the tl has no balls) then a quick boring cycle. 1400 rpm 0.018"per rev 0.05" depth, a 0.01" at 0.004/rev finishing pass followed by a spring pass.
I've had great luck and made lots of these parts in the past with consistant boring. Now I am chasing an offset that keeps moving around by 0.02", totally random seeming.
Tool post and holder is very clean every time. I've put a dial on the tool tip mounting the mag base to the frame of the machine. Pushed pulled, repeatedly placed and locked tool. Repeats within tenths and no loose Components.
What gives? Tips tricks, am I blindly missing something??
Machine had a pretty bad crash a while back. But the run after on some small 4140 pins repeated within 0.0003" non problem.
Thanks for reading my novel and any input you have