The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
--- Quote from: PK on September 05, 2018, 05:51:41 PM ---I'm sure I'm telling you how to suck eggs, but I've re read your post and you didn't explicitly say that you would normally put tools in a rear turret 'facing down', ie the chip curls on the floor side of the insert, not the ceiling side. M3 is then clockwise from the rear of the chuck etc....
--- End quote ---
PK I chose to use mostly 'facing up' tools as a/ the lathe came with many of this style VDI 40 holder and only a few of the facing down type, and b/ the cutting forces are correctly down into the ways rather than tending to lift the turret.
From an operational point of view the only disadvantage is the way the chips fly, and it has the huge advantage of easy access to the tip for changing, and visibility whilst cutting is in progress.
But you might well be right that this is the root cause of my confusion !
The fact remains that M03 makes the chuck turn clockwise looking from the tailstock on this lathe
awemawson:
--- Quote from: DICKEYBIRD on September 05, 2018, 10:05:09 PM ---Surely Beaver didn't convince Siemens to reverse the Beaver lathe control's spindle rotation away from the world standard M3/M4/M5 conventions just for their machine?
--- End quote ---
Milton, Siemens needn't have been involved - all it would take is to reverse the wires to the spindle motor armature, only two wires as it's DC. (The two from the tacho would also need reversing of course)
awemawson:
Just to convince any doubters, myself included, here is a little video showing an M03 starting the spindle !
russ57:
No there isn't...
Russ
awemawson:
Strange - it's marked as Public :palm:
Maybe it need time to cook :scratch:
I came across this paragraph in the Generation 2 commissioning notes - (NB mine is a Gen1) Of course they don't say the view point, but if the convention is to look from behind the chuck then it would confirm that as mine is set is intentional
later edit: I've just tried the YouTube video on the Wife's iPad (so that I'm not logged in) and it shows fine
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