I will check the cross slide as that is a distinct possibility on this machine.Just a thought. Instead of shimming it could you re-cut the face to get it perfect? Also, could it be that your cross slide is off my 0.003?
Robert
The cross slide is spot on so no probs there.
Whoo hoo, the .14mm shim (.08+.06) worked perfectly, absolutely spot on.
First task was to drill my boring bar so I could add a cutter in the middle.
I've done the 6mm this is the 3.3mm for the 4mm grub screw to hold the cutter.
View attachment 139773
The second session was a test cut to profile a 10 mm thick aluminium section at a radius of 45mm.
Very smooth cut that fit onto a 90mm dia section of the telescope.
Thats a lot of tool overhang.
Now I can cut the brackets to fit the scope.
View attachment 139774
The saga will continue here:-
http://www.hobby-machinist.com/threads/80mm-long-focal-length-refractor.26212/page-4#post-409720
no video Bob but the results of four passes here.
http://www.hobby-machinist.com/threads/80mm-long-focal-length-refractor.26212/page-4#post-436866
second from last post on that page.
Not that I noticed or lets be honest - that I looked for.the finish is amazing given the length of that tool bit and the distance from the chuck, did you get any springing in that setup?
Thanks but it wont be that difficult, look at how long it takes me.I'm going to have to work hard to catch up to you, you continue to set a high standard.
Not that I noticed or lets be honest - that I looked for.
I did this first on some parts for the central pier of the telescope, on brass and stainless. These didnt appear to cause any problems then.
Thanks but it wont be that difficult, look at how long it takes me.