Leveling machines

[Rod RenshawParticipant @rodrenshaw28584]

+1 for the meaning of conflate as the combination of two concepts which can be useful or misleading, students of logic have to tread carefully to avoid falling into this trap. "

"Conflate" is also often used to indicate an intention to mislead, by making a false comparison or connection, a common politicions trick.

Rod

[Ady1Participant @ady1]

Posted by not done it yet on 26/07/2021 16:50:51:

Questions: Are boats level, when at sea? If they needed to be precisely level to the planet Earth surface, how did the navy cope with all those Drummonds during the war?

Aha! A Drummond question/matter

Drummonds are self leveling cantilever beds, just bolt that suckah down

HOWEVER

If we look at a standard drummond M it has a 3 hole bed but if you look at the longbed its a bit of a monster with 5 holes and won't be very stiff with so much bed waving about in the air, so it will be light cuts only

 

and I like my conflates with milk no sugar

Edited By Ady1 on 04/08/2021 20:12:30

[Kiwi BlokeParticipant @kiwibloke62605]

"Drummonds are self leveling cantilever beds…"

Aaargh!

[Howard LewisParticipant @howardlewis46836]

Taking the twist out of the bed has to be one of the first priorities. (Work can be turned parallel, if the the Tailstockm is misaligned, but unused ) Seeking accuracy has to be undertaken, when the basics are correct, (No excess wear in the bearings, bed or Saddle, loose gibs, and so on. )

Since the lathe can turn a cantilevered workpiece parallel, aligning the Tailstock across the bed will only help to ensure parallel turning between centres.

NOW we get back into the argument about how great is the effect of vertical misalignment. The last time this argument took place, it seemed that vertical misalignment had a far smaller effect than horizontal..

It is all a matter of priorities. No good worrying about how deep a cut can be taken, how accurate the machine is, or how parallel it will cut, if the motor won't run!

Howard

[SillyOldDufferModerator @sillyoldduffer]

Posted by not done it yet on 26/07/2021 16:50:51:

Questions: Are boats level, when at sea? If they needed to be precisely level to the planet Earth surface, how did the navy cope with all those Drummonds during the war?

Not only are ships not level, they roll, yaw, pitch, hog and sag! And if the wave length is just right, repeated hogging and sagging doesn't take long to break a ship in half.

Got me wondering how violently a lathe could be moved before it stopped cutting straight. Myfords would be no good in an airliner because a sharp dive would empty all the oil out, but I think they would cut OK until the bearing seized. Not a problem with well-designed Chinese lathes because they would work OK upside down!

Dave

[V8EngParticipant @v8eng]

Posted by SillyOldDuffer on 05/08/2021 19:16:10:

Not a problem with well-designed Chinese lathes because they would work OK upside down!

Dave

Standing upside down to use it gives you a nasty headache though.

Edited By V8Eng on 05/08/2021 19:36:49

[Maurice TaylorParticipant @mauricetaylor82093]

Posted by SillyOldDuffer on 05/08/2021 19:16:10:

Posted by not done it yet on 26/07/2021 16:50:51:

Questions: Are boats level, when at sea? If they needed to be precisely level to the planet Earth surface, how did the navy cope with all those Drummonds during the war?

Not only are ships not level, they roll, yaw, pitch, hog and sag! And if the wave length is just right, repeated hogging and sagging doesn't take long to break a ship in half.

Got me wondering how violently a lathe could be moved before it stopped cutting straight. Myfords would be no good in an airliner because a sharp dive would empty all the oil out, but I think they would cut OK until the bearing seized. Not a problem with well-designed Chinese lathes because they would work OK upside down!

Dave

Hi,please explain where oil would empty from a Myford.They have a total loss system fed by two glass sealed oilers.

Thank you

Maurice

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