topic Re: Haas Post Processor issue for G43, Help in Fusion Manufacture Forum

Haas Post Processor issue for G43, Help

jasonKJY3E — Tue, 14 Apr 2026 10:12:51 GMT

New to CNC Machining,

I have a older haas 2001, and for the post processor, it want the G43 on the second line after calling out the tool

when i post process, i have to manually move this in notepad,

using the Pre NGC,

(2D Adaptive2)
N25 T5 M6
N30 S5000 M3
N35 G17 G90
N40 G54
N45 M8
N50 G1 X0.2873 Y-1.8658 F500.
N55 G0 G43 Z0.6 H5
N60 T6
N65 G0 Z0.2
N70 Z-0.1
N75 G1 Z-0.15 F40.

With out editing each tool change the machine stalls out,

Is there a fix to permanently move the G43,

Thank you

Re: Haas Post Processor issue for G43, Help

douglas_pierceC66EW — Tue, 14 Apr 2026 10:42:21 GMT

What do you mean the machine stalls out?

Re: Haas Post Processor issue for G43, Help

programming2C78B — Tue, 14 Apr 2026 11:05:52 GMT

is that code your edited or posted code? G43 has to be on the same line as H and it must match your tool #.

Re: Haas Post Processor issue for G43, Help

obulesub — Mon, 20 Apr 2026 09:42:46 GMT

Hi @jasonKJY3E,

I wanted to check in and see if you saw @douglas_pierceC66EW and @programming2C78B follow up questions and if assistance is still needed or if you found a solution to your question already? Please share any available information so the community can assist you further.

All the best,

Obulesu| Community Manager

Re: Haas Post Processor issue for G43, Help

jasonKJY3E — Mon, 20 Apr 2026 17:41:14 GMT

If i leave the Processor without editing the Haas will do a tool change and then not make a move and the spindle spends,

I can edit the Post Processor, and run the program, but tired of editing, looking at other forums sites the G43 on older haas machines need to be the second line,

I have been editing for some time and it works great, just do not want to edit the Post Processing anymore,

For example below the Haas Mill works fine,

Correct when i edit

I removed a bunch of line of code so this is not so long to look at, but mostly the 2nd line is the issue,

%
O14444
(Using high feed G1 F500. instead of G0.)
(T5 D=0.5 CR=0. - ZMIN=0. - flat end mill)
(T11 D=0.25 CR=0. TAPER=45deg - ZMIN=-0.04 - chamfer mill)
N10 G90 G17
N15 G20
N20 G53 G0 Z0.

(Face3)
N25 T5 M6
N55 G0 G43 Z0.6 H5 This is the line i have to move
N30 S5000 M3
N35 G17 G90
N40 G54
N45 M8
N50 G1 X3.3935 Y-0.3905 F500.
N60 T11
N65 G0 Z0.2
N70 G1 Z0.05 F13.333
N75 G18 G3 X3.3435 Z0. I-0.05 K0. F40.

(2D Chamfer6)N135 M1
N170 G0 G43 Z0.6 H11
N140 T11 M6
N145 S5000 M3
N150 G17 G90
N155 G54
N160 M8
N165 G1 X1.935 Y0. F500.
N180 G0 Z0.2
N185 G1 Z0.08 F13.333
N190 Z-0.04
N195 X1.96 F40.
J-0.0177
N365 X0.0831 Y0.0177 I0.0831 J0.0177
N400 G53 G0 Y0.
N405 M30

Before Editing

%
O15555
(Using high feed G1 F500. instead of G0.)
(T5 D=0.5 CR=0. - ZMIN=-0.437 - flat end mill)
(T11 D=0.25 CR=0. TAPER=45deg - ZMIN=-0.08 - chamfer mill)
N10 G90 G17
N15 G20
N20 G53 G0 Z0.

(2D Contour7)
N25 T5 M6
N30 S5000 M3
N35 G17 G90
N40 G54
N45 M8
N50 G1 X2.8213 Y-0.8731 F500.
N55 G0 G43 Z0.975 H5 This has to go into the second line after N25 T5 M3
N65 G0 Z0.575
N70 G1 Z0.4144 F13.333
N75 Z-0.387

N270 G0 Z0.975
N275 M9
N280 M5
N285 G53 G0 Z0.

(2D Chamfer5)
N290 M1
N300 S5000 M3
N305 G17 G90
N310 G54
N315 M8
N320 G1 X1.472 Y-0.5425 F500.
N325 G0 G43 Z0.975 H11
N330 T5
N335 G0 Z0.575
.0132 J0.0789
N430 G1 X2.0281
N435 Y-0.5425
N440 G0 Z0.975

N445 M5
N450 M9
N455 G53 G0 Z0.
N460 X1.3468
N465 G53 G0 Y0.
N470 M30

Re: Haas Post Processor issue for G43, Help

douglas_pierceC66EW — Mon, 20 Apr 2026 18:00:30 GMT

I've been running Haas for over 30 years now and I've never had to put the G43 line after the tool change. My first instinct would be to check setting #42 (M00 after M06). This may be causing your issue if it's turned on. If that's not the issue, I would contact your local Haas distributor or Haas directly and see why your program freezes at the tool change because it shouldn't.

Re: Haas Post Processor issue for G43, Help

jasonKJY3E — Tue, 21 Apr 2026 09:07:12 GMT

Thank you will try that also

This was in the 360 Fusion Post P hand book,

does it mean anything

If TCP positions are output in a 3+2 operation you will have to ensure that the TCP has been enabled for
this operation (G43.4, TRAORI, etc.).

Re: Haas Post Processor issue for G43, Help

douglas_pierceC66EW — Tue, 21 Apr 2026 15:10:13 GMT

3+2 is 5 axis positioning, this has no bearing on what you're doing.

Re: Haas Post Processor issue for G43, Help

obulesub — Wed, 22 Apr 2026 06:20:23 GMT

Hi @jasonKJY3E,

I wanted to check in and see if you still needed assistance, or if you found a solution to your question already? Let us know if you need further assistance by providing an update or if you have found a solution, please share it with the community so other members who may have the same question could learn from your experience.

All the best,

Obulesu | Community Manager