#10 Threading Increments anomoly

[Goatofmendez]

I get different results from the Helper to Mach3 running. Using euqal cutting depth, diameter mode, metric.

1/2 UNF 20 thread: G76 P1.27 R12.597 X11.005 H0.306 I29.5 K7.773 Z-32.5 L360 Q3

  Helper                  Mach3

---

Pass Increment Depth
1 0.153 0.153 0.307
2 0.064 0.217 0.1272
3 0.049 0.266 0.0975
4 0.041 0.307 0.0823
5 0.036 0.343 0.0725
6 0.033 0.376 0.0655
7 0.030 0.406 0.0602
8 0.028 0.434 0.0561
9 0.026 0.460 0.0527
10 0.025 0.485 0.0498
11 0.024 0.509 0.0474
12 0.023 0.532 0.0453
13 0.022 0.553 0.0434
14 0.021 0.574 0.0418
15 0.020 0.594 0.0403
16 0.020 0.614 (min) 0.039
17 0.020 0.634 (min) 0.0378
18 0.020 0.654 (min) 0.0367
19 0.020 0.674 (min) 0.0357
20 0.020 0.694 (min) 0.0347
21 0.020 0.714 (min) 0.034
22 0.020 0.734 (min) 0.0331
23 0.020 0.754 (min) 0.0323
24 0.020 0.774 (min) 0.0317
25 0.020 0.794 (min) 0.031
26 0.003 0.797 (min) 0.0304
27 -1.5654
28 0

[Goatofmendez]

The form has removed spacing - try this (extra section is what mach3 shows.

Helper code line for 1/2 UNF 20 thread: G76 P1.27 R12.597 X11.005 H0.306 I29.5 K7.773 Z-32.5 L360 Q3

  Helper   ---------------------- Mach3

---

Pass Increment Depth
1 0.153 0.153 ---------------------------- 0.307
2 0.064 0.217 ---------------------------- 0.1272
3 0.049 0.266 ---------------------------- 0.0975
4 0.041 0.307 ---------------------------- 0.0823
5 0.036 0.343 ---------------------------- 0.0725
6 0.033 0.376 ---------------------------- 0.0655
7 0.030 0.406 ---------------------------- 0.0602
8 0.028 0.434 ---------------------------- 0.0561
9 0.026 0.460 ---------------------------- 0.0527
10 0.025 0.485 ---------------------------- 0.0498
11 0.024 0.509 ---------------------------- 0.0474
12 0.023 0.532 ---------------------------- 0.0453
13 0.022 0.553 ---------------------------- 0.0434
14 0.021 0.574 ---------------------------- 0.0418
15 0.020 0.594 ---------------------------- 0.0403
16 0.020 0.614 (min) ---------------------------- 0.039
17 0.020 0.634 (min) ---------------------------- 0.0378
18 0.020 0.654 (min) ---------------------------- 0.0367
19 0.020 0.674 (min) ---------------------------- 0.0357
20 0.020 0.694 (min) ---------------------------- 0.0347
21 0.020 0.714 (min) ---------------------------- 0.034
22 0.020 0.734 (min) ---------------------------- 0.0331
23 0.020 0.754 (min) ---------------------------- 0.0323
24 0.020 0.774 (min) ---------------------------- 0.0317
25 0.020 0.794 (min) ---------------------------- 0.031
26 0.003 0.797 (min) ---------------------------- 0.0304
27 ------------------------------------------- -1.5654
28 ------------------------------------------- 0

[stephanbrunker]

Why in the world do you want to use so many passes? To get these values, i had to aim for 37 in equal strategy. Because of the minimum, only 32 should be executed anyway. For most of them, you hit the minimum value which is because without pressure, the tool won't cut properly. Even my lathe with only 500 Watts can make this thread in 10-15 passes max, and that is on the safe side.

The difference can be because of rounding of such small amounts or a different setting for the minimum. After pass #16, the calculator hits the minimum with 0.02 and Mach3 does not and continues to reduce the depth.

If the Minimum value in Mach3 is in radius and independent of the XMode, I can fix that. Atm, the value is calculated depending on the mode.

[Goatofmendez]

It's OK I had to stop using your helper. It caused more problems than it
solves.

Regards

Steve

From: stephanbrunker [mailto:stephanbrunker@users.sourceforge.net]
Sent: 08 July 2018 10:23
To: [mach3threadinghelper:tickets]
Subject: [mach3threadinghelper:tickets] #10 Threading Increments anomoly

Why in the world do you want to use so many passes? To get these values, i
had to aim for 37 in equal strategy. Because of the minimum, only 32 should
be executed anyway. For most of them, you hit the minimum value which is
because without pressure, the tool won't cut properly. Even my lathe with
only 500 Watts can make this thread in 10-15 passes max, and that is on the
safe side.

The difference can be because of rounding of such small amounts or a
different setting for the minimum. After pass #16, the calculator hits the
minimum with 0.02 and Mach3 does not and continues to reduce the depth.

If the Minimum value in Mach3 is in radius and independent of the XMode, I
can fix that. Atm, the value is calculated depending on the mode.

---

[tickets:#10] https://sourceforge.net/p/mach3threadinghelper/tickets/10/
Threading Increments anomoly

Status: open
Milestone: 1.0
Created: Tue Feb 27, 2018 02:39 PM UTC by Goatofmendez
Last Updated: Tue Feb 27, 2018 02:46 PM UTC
Owner: nobody

I get different results from the Helper to Mach3 running. Using euqal
cutting depth, diameter mode, metric.

1/2 UNF 20 thread: G76 P1.27 R12.597 X11.005 H0.306 I29.5 K7.773 Z-32.5 L360
Q3

Helper Mach3

---

Pass Increment Depth
1 0.153 0.153 0.307
2 0.064 0.217 0.1272
3 0.049 0.266 0.0975
4 0.041 0.307 0.0823
5 0.036 0.343 0.0725
6 0.033 0.376 0.0655
7 0.030 0.406 0.0602
8 0.028 0.434 0.0561
9 0.026 0.460 0.0527
10 0.025 0.485 0.0498
11 0.024 0.509 0.0474
12 0.023 0.532 0.0453
13 0.022 0.553 0.0434
14 0.021 0.574 0.0418
15 0.020 0.594 0.0403
16 0.020 0.614 (min) 0.039
17 0.020 0.634 (min) 0.0378
18 0.020 0.654 (min) 0.0367
19 0.020 0.674 (min) 0.0357
20 0.020 0.694 (min) 0.0347
21 0.020 0.714 (min) 0.034
22 0.020 0.734 (min) 0.0331
23 0.020 0.754 (min) 0.0323
24 0.020 0.774 (min) 0.0317
25 0.020 0.794 (min) 0.031
26 0.003 0.797 (min) 0.0304
27 -1.5654
28 0

---

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[stephanbrunker]

Nobody forces you ... I only wish I could fix some issues based on Mach3 itself. MinIncrement is such a case, it depends on the X axis mode. Means: If you change the mode, you have to change the minimum default too if you want equal behaviour. (same for Clearances ...) That is not entirely logical, but anyway. I only regret my time looking into issues which aren't part of what I did.