Manual tool change

[gabi68]

Hi all,

I finish the install of a Mechatron pneumatic tool changer for a 2.2 KW Chinese spindle. Everything works fine. Reference the machine HOME ALL (X,Y,Z axis green). The next step is to measure tools and populate the tools table.

Done that with a Tschorn 3D save plus (similar device with Haimer) mounted in a SK10 ER16 tool holder, a digital height gage and a granite plate with appropriate hole for holding the tool holder with the tool facing up.
Measure first the 3D probe (Tshorn) with the tip pressed till reads zero on both needles. The measured value was 182.66 mm entered in tool table under tool 50.
Next measure a 4mm end mill also mounted in a tool holder, done that with a 64.51 mm length and entered that value under tool 1 in the tool table.

Now using the tools.
Type in MDI M6 T50
Put the 3D probe and jog the machine on Z till both needles are zero.
Zero Z axis.
Type in MDI M6 T1.
Put tool 1
Type in MDI G43 H1.
Nothing is happening.
If I not zero the Z axis the Z axis is going up till trigger the limit switch.
What I am doing wrong?
What is the right procedure for doing a manual tool change?

Thank you in advance
Gabi

[Battwell]

g43 h toolnumber will load that tools length offset (check tool offset after doing so in offsets page)
eg g43 t1 will load the tool 1 length offset into tool offset ( and z dro will change by the difference between old and new tool)
it wont show if your in machine co ordinates- only in g54 to g59.

note that a lot of cam code cancels out g43 with a g49 at the start of the code. ( i deleted the g49 from my post processor to stop this)

[gabi68]

Hi all,

I still fighting with this. Can anyone shed some light? What I need to know is:
- the measured values are positive or negative?
- using G43 Hx (the tool already selected by M6 Tx) will give the difference between old tool and new tool?
- how can I send the machine to the new coordinates (with the new offsets)? Using G0 G43 Hx Z0 will send the machine to just referenced 0 after using the 3d probe (Haimer).
I really need someone to explain this a little more in depth.

Gabi

[ger21]

When you probe for Z zero, assign a tool number to the probe with an offset of 0, and do a G43 Hx for the probe before probing. Then the offsets for the other tools will be relative to the probe.

[gabi68]

When you probe for Z zero, assign a tool number to the probe with an offset of 0, and do a G43 Hx for the probe before probing. Then the offsets for the other tools will be relative to the probe.

Hi Gerry,

Done what you suggested, but still nothing.
What i've done:
- reference the machine (all axes green);
- choose tool 50 with 0 offset for probe;
- done a G43H50 (with tool 0 no m6t50);
- jog the machine Z axis down till both needles read 0 on the probe;
- zero Z axis;
- change to tool 1 m6t1 (with a measured length of 64.51mm);
- do a block
G54 G00 G90 X0Y0
G43 H1 Z0
M30
NOTHING.
I think this is normal since the machine is on 0 already.
What I am doing wrong?


Thank you
Gabi

[ger21]

In your tool table, tool #50 length = 0, and tool #1 = 64.51?
If so, I don't have an answer for you.
Maybe try a G49 before changing the tools (After probing)
(I don't use G43 myself)

[gabi68]

In your tool table, tool #50 length = 0, and tool #1 = 64.51?
If so, I don't have an answer for you.
Maybe try a G49 before changing the tools (After probing)
(I don't use G43 myself)

Thank you Gerry for taking time to look into this issue.
Maybe Balasz or somebody else from programing team will have an answer.

Gabi

[gabi68]

Anyone from CNCDrive have a saying on this?

Thank you
Gabi

[ger21]

If you look at the offsets page, when you are doing the G43, is the tool offset value changing?

If I enter values in the tool table, my Z value changes with each G43 Hxx call.

[gabi68]

If you look at the offsets page, when you are doing the G43, is the tool offset value changing?

If I enter values in the tool table, my Z value changes with each G43 Hxx call.

Hi Gerry,

Yes, value change according to the values entered in the tool table. M6T1 (measured value 64.51), G43H1 reports negative 64.51 in Z axis. The problem lies when I change tools. The G43 does not update with the difference between old tool and new tool. M6T2 (measured value 125.22), G43H2 reports negative 125.22. I was thinking it should put the difference between T1 and T2. Maybe I am wrong hence asking.

Gabi