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Thread Mill Wizard - Slanted thread produced
« on: August 02, 2012, 06:08:05 PM »
Hello, every time I try to use the thread Mill Wizard for a ball nut the thread produced is sharp and a great fit but it is always slanted. Pictures and g-code below, I am beginning to think it maybe my MACH setup as I have seen many do this. I did check to ensure the TAIG mill is square

A visual of what I am trying to do is here. http://www.youtube.com/watch?v=Suwl_HzouVU&feature=player_embedded

Any help would be appreciated. . Thx.

---------Thread Milling G-Code---------------------------------
G0 G49 G40 G17 G80 G50 G90
M6 T0 (TOOL DIA. 0.65)
G20 (Inch)
M03 S0
G64
G00 G43 H0 Z0.1
(Right hand ID Conv)
X-0.3075 Y0.37375
G00 G42 P0.325 X0.06625 F10
G00 Z0.0313
G02 X0.44 Y0 R0.37375
G02 X-0.44 Y0 R0.44 Z0
G02 X0.44 Y0 R0.44 Z-0.0313
G02 X-0.44 Y0 R0.44 Z-0.0625
G02 X0.44 Y0 R0.44 Z-0.0938
G02 X-0.44 Y0 R0.44 Z-0.125
G02 X0.44 Y0 R0.44 Z-0.1563
G02 X-0.44 Y0 R0.44 Z-0.1875
G02 X0.44 Y0 R0.44 Z-0.2188
G02 X-0.44 Y0 R0.44 Z-0.25
G02 X0.44 Y0 R0.44 Z-0.2813
G02 X-0.44 Y0 R0.44 Z-0.3125
G02 X0.44 Y0 R0.44 Z-0.3438
G02 X-0.44 Y0 R0.44 Z-0.375
G02 X0.44 Y0 R0.44 Z-0.4063
G02 X-0.44 Y0 R0.44 Z-0.4375
G02 X0.44 Y0 R0.44 Z-0.4688
G02 X-0.44 Y0 R0.44 Z-0.5
G02 X0.44 Y0 R0.44 Z-0.5313
G02 X-0.44 Y0 R0.44 Z-0.5625
G02 X0.44 Y0 R0.44 Z-0.5938
G02 X-0.44 Y0 R0.44 Z-0.625
G02 X0.44 Y0 R0.44 Z-0.6563
G02 X-0.44 Y0 R0.44 Z-0.6875
G02 X0.44 Y0 R0.44 Z-0.7188
G02 X-0.44 Y0 R0.44 Z-0.75
G02 X0.44 Y0 R0.44 Z-0.7813
G02 X-0.44 Y0 R0.44 Z-0.8125
G02 X0.44 Y0 R0.44 Z-0.8438
G02 X-0.44 Y0 R0.44 Z-0.875
G02 X0.44 Y0 R0.44 Z-0.9063
G02 X-0.44 Y0 R0.44 Z-0.9375
G02 X0.44 Y0 R0.44 Z-0.9688
G02 X-0.44 Y0 R0.44 Z-1
G02 X0.44 Y0 R0.44 Z-1.0313
G02 X-0.44 Y0 R0.44 Z-1.0625
G02 X0.44 Y0 R0.44 Z-1.0938
G02 X-0.44 Y0 R0.44 Z-1.125
G02 X0.44 Y0 R0.44 Z-1.1563
G02 X-0.44 Y0 R0.44 Z-1.1875
G02 X0.44 Y0 R0.44 Z-1.2188
G02 X-0.44 Y0 R0.44 Z-1.25
G02 X0.44 Y0 R0.44 Z-1.2813
G02 X-0.44 Y0 R0.44 Z-1.3125
G02 X0.44 Y0 R0.44 Z-1.3438
G02 X-0.44 Y0 R0.44 Z-1.375
G02 X0.44 Y0 R0.44 Z-1.4063
G02 X-0.44 Y0 R0.44 Z-1.4375
G02 X0.44 Y0 R0.44 Z-1.4688
G02 X-0.44 Y0 R0.44 Z-1.5
G02 X0.44 Y0 R0.44 Z-1.5313
G02 X-0.44 Y0 R0.44 Z-1.5625
G02 X0.44 Y0 R0.44 Z-1.5938
G02 X-0.44 Y0 R0.44 Z-1.625
G02 X0.44 Y0 R0.44 Z-1.6563
G02 X-0.44 Y0 R0.44 Z-1.6875
G02 X0.44 Y0 R0.44 Z-1.7188
G02 X-0.44 Y0 R0.44 Z-1.75
G02 X0.44 Y0 R0.44 Z-1.7813
G02 X-0.44 Y0 R0.44 Z-1.8125
G02 X0.44 Y0 R0.44 Z-1.8438
G02 X-0.44 Y0 R0.44 Z-1.875
G02 X0.44 Y0 R0.44 Z-1.9063
G02 X-0.44 Y0 R0.44 Z-1.9375
G02 X0.44 Y0 R0.44 Z-1.9688
G02 X0.06625 Y-0.37375 R0.37375
G00 G40 X0
G00 Z0.1
M5 M9
M30

Offline Hood

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Re: Thread Mill Wizard - Slanted thread produced
« Reply #1 on: August 03, 2012, 02:55:25 AM »
Code looks good so only things I can think of is Z out of square, or an axis losing steps.
Hood
Re: Thread Mill Wizard - Slanted thread produced
« Reply #2 on: August 07, 2012, 10:59:37 PM »
Hello, I have done this at least 20 times with the same result and I have never heard missing steps. I have used 1-2-3 blocks to check if the mill head is square.

Is there anything I can check from a z-axis motor tuning perspective?

Offline Tweakie.CNC

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Re: Thread Mill Wizard - Slanted thread produced
« Reply #3 on: August 08, 2012, 02:01:40 AM »
Hi NGR,

Just out or curiosity, Is the 'out of square' always in the same direction ??

Tweakie.
KEEP SAFE !

Offline Hood

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Re: Thread Mill Wizard - Slanted thread produced
« Reply #4 on: August 08, 2012, 02:50:04 AM »
If you have home switches do a verify after running the code to see if things are ok.
Hood

Offline Hal

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Re: Thread Mill Wizard - Slanted thread produced
« Reply #5 on: August 08, 2012, 08:44:12 PM »
You made the cutter from a tap. Did you leave too much of the flute? Normal thread mills there is no helix on the cutters.