Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Fred_evans on September 14, 2012, 04:29:08 AM

Title: a few questions aboput tool table setting up
Post by: Fred_evans on September 14, 2012, 04:29:08 AM

Hello Everyone,
Regarding tooltable setup,offsets and coordinate systems-

Please help me straighten a few things out in my mind. I know that these are all covered in
the manual but I have read through them so often that i am now completely confused

The machine is a lathe with 2 home switches working Mach3 Screenset 1024.lset

Please look at my "Simple Simon"  explanations and see if they are correct and help me with the setup.

The machine is started and told to "set home X "  "set home Z"

We have machine coordinates,program coordinates and part coordinates.

Are the following assumptions correct ?

Machine coordinates x0 z0 is the position that the toolpost will return to when G28 is called
Is this correct?

Are there times when X0Z0 machine coordinates will not be the set home position?

Program coordinate are as follows. X0 will be the chuck centreline.Z0 is usually set at the righthand
face of the workpiece.

Part coordinates will be the same as program coordinates.

Therefore program coordinates and part coordinates are the same thing? If this is correct what is
the difference between the two

Now regarding setting op the tooltable. ( for starting only 2 tools are used a rthand knife tool for
OD and facing) and a 3.5mm parting tool which cutting point is the righthand corner of the tip)
On the manual screen I set up t0101 by :-
calling T0101
doing a facing cut - this is set to axis position z=0
doing an od cut and measuring (in my case od=47.06) I set axis position x=47.06
X and Z part Zero DRO's are both on zero (0.000)
Now i open tool table and Tool 0101 is at the following positions
axis position x=47.06 Z=0-- all the other DROs are set to show 0 (Zero) including
radius,offsets wear and length.

Now I stay in tooltable and select and fit tool 0202. I jog the cutting edge to the edge of the work
(position would be t0101 x47.06 z0 )

Tool0202 cutting tip is now x47.06z0

Now which DRO must be set ? axis position,tool offsets or part zeroing ?

Please help
many thanks

Title: Re: a few questions aboput tool table setting up
Post by: RICH on September 17, 2012, 06:23:05 AM

Fred,
Have read of Appendix "F" in the LazyTurn Manual which can be found in Members Doc's.
Should answer a lot of your questions.
RICH

Title: Re: a few questions aboput tool table setting up
Post by: RICH on September 17, 2012, 06:30:31 AM

Here is some addtional info on G28 & G30 saved from another thread worth reading.
RICH