A Triumph is not a big rigid machine, I can assure you of that. Also I can assure you a bigger heavier more rigid machine can easily twist if not adjusted. The floor in my workshop constantly moves due to the waves seeping through the sea wall, through the ground and into the burn (stream) behind my workshop and I gave up levelling/adjusting the CNC as if I need accuracy over 1m I use the CNC to do the final cut as a taper.Yes spent hours doing that a while ago only to discover it is a waste of time on a big rigid machine.
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It is pretty rigid compared to a hobby machine.A Triumph is not a big rigid machine, I can assure you of that. Also I can assure you a bigger heavier more rigid machine can easily twist if not adjusted. The floor in my workshop constantly moves due to the waves seeping through the sea wall, through the ground and into the burn (stream) behind my workshop and I gave up levelling/adjusting the CNC as if I need accuracy over 1m I use the CNC to do the final cut as a taper.
Anyway as has been said I would just leave it, unlikely a few thou will be a problem for most things.
Also I would say Aluminium is probably not the best for a test anyway.
The Autostrong?....
In other words, it was wear in the chuck Jaws
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Nah the 4 jaw PrattThe Autostrong?
You say the Triumph isn't rigid.A Triumph is not a big rigid machine, I can assure you of that. Also I can assure you a bigger heavier more rigid machine can easily twist if not adjusted. The floor in my workshop constantly moves due to the waves seeping through the sea wall, through the ground and into the burn (stream) behind my workshop and I gave up levelling/adjusting the CNC as if I need accuracy over 1m I use the CNC to do the final cut as a taper.
Anyway as has been said I would just leave it, unlikely a few thou will be a problem for most things.
Also I would say Aluminium is probably not the best for a test anyway.
Yes will try my collet chuck and 4 jaw before I move the headNah the 4 jaw Pratt
I could part almost as quick in the wee CNC Conect lathe once I had the gibs tightened upYou say the Triumph isn't rigid.
Your parting off procedure says otherwise
I'd say it's maybe because his saddle and cross gibs etc are in good nick didn't you recently have problems with your gibs not fitting properly?You say the Triumph isn't rigid.
Your parting off procedure says otherwise
No not me thankfully.I'd say it's maybe because his saddle and cross gibs etc are in good nick didn't you recently have problems with your gibs not fitting properly?
Any half decent lathe should part off cleanly without much chatter... unless things aren't sitting right... the idea being that all the sliding surfaces are smooth, parallel, uniform and have a nice film of oil between them which damps vibrations...
I have a feeling there's a reason why the rebuilders use solid steel test bars too... but if you get the results you want I suppose it doesn't matter.
yeah I don't think I could bring myself to use the surfacing feed for parting off, myselfNo not me thankfully.
Apart from the slight taper the old girl has very little wear.
I have no problems parting off but not brave enough to be as aggressive as Hood
Go for it, I find the constant feed in is a lot less scary than trying to judge manually feeding in.yeah I don't think I could bring myself to use the surfacing feed for parting off, myself