Stepper drive for a Lathe Cross Slide. Issue No.246

[Victor Higgins 1Participant @victorhiggins1]

Under the heading , The Electronic Lead Screw X Axis: It states that the Z is parallel to the axis of the lathe spindle, the same as on a mill, and X runs at right angles to the axis of the lathe spindle. i.e. the cross slide. Is correct?

[Victor Higgins 1Participant @victorhiggins1]

[Martin ConnellyParticipant @martinconnelly55370]

Yes, z axis positive direction is away from the chuck. X axis positive is towards the operator for a front tool post.

Martin

[Neil WyattModerator @neilwyatt]

Think of lying your mill on its back, so the column (z) becomes like the bed of the lathe.

[Michael GilliganParticipant @michaelgilligan61133]

… and if you want to control movement in the Y axis, you need a vertical slide.

MichaelG.

[John Stevenson 1Participant @johnstevenson1]

Posted by Michael Gilligan on 12/09/2016 00:24:09:

… and if you want to control movement in the Y axis, you need a vertical slide.

MichaelG.

Lathe has X, Z, A and C

[Michael GilliganParticipant @michaelgilligan61133]

John,

I was referencing Neil's analogy.

MichaelG.

[not done it yetParticipant @notdoneityet]

Ooh-er! I'm in trouble, my 2 axis dro for my lathe only has x and y axes.

Anyone seen a 2 axis dro with z axis plus one other?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by not done it yet on 12/09/2016 06:01:36:

Ooh-er! I'm in trouble, my 2 axis dro for my lathe only has x and y axes.

.

Various reasonably priced solutions are available:

Sticky Labels; Marker Pen; etc.

MichaelG.

.

P.S. … Yuriy has it sussed

http://www.yuriystoys.com/2014/01/touchdro-coordinate-system.html

Edited By Michael Gilligan on 12/09/2016 07:54:47

[Mike PooleParticipant @mikepoole82104]

Lucky we are not robots having to calculate the tool path in multiple coordinate systems, back in the 80s this challenged the computing power of a robot and could have some odd effects.

Mike

[John Stevenson 1Participant @johnstevenson1]

Posted by not done it yet on 12/09/2016 06:01:36:

Ooh-er! I'm in trouble, my 2 axis dro for my lathe only has x and y axes.

Anyone seen a 2 axis dro with z axis plus one other?

.

.

And to muddy the waters even further when you swap from Absolute to Incremental the X, Y, Z changes to U, V, W

[Author]

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