A very nice presentation, well done! I considered buying the Vertex HV-6 and looked up the user manual for it. In that manual are tables for two sets of index discs (they call them plates). The table for HV-6 with worm ratio 1:90 is denoted DP-1. There are both typos, omissions and errors in this table. (I have not yet checked the other table for the larger discs.) It's tedious and error prone to check the tables by hand so I wrote a computer program to compute a complete table, given a worm ratio and a set of discs. The DP-1 set has a theoretical number of 234 different divisions spanning from 1 to 4410. Not very practical for drilling hole circles, but maybe very large divisions are useful for engraving patterns or similar? An annoying fact is that 64 is missing in this set. The printed table in the manual stops at 100 divisions. For larger divisions, the table becomes more and more sparse. A snippet of a printout from the program follows below. If there is interest, I can present the complete list in a follow up comment. It should fit within the YT 10.00 character limit. Key to the table headings: T is the desired division H is the disc and hole track to be used N is the number of full turn cranks and stepped holes Ex. To get a division of 7 (the bolt circle on Kontax Stirling Engines LTDs :-), use the 21 hole circle on disc B and crank 12 full turns and 18 steps (holes) for each division. Disc A: 15, 16, 17, 18, 19, 20 Disc B: 21, 23, 27, 29, 31, 33 Disc C: 37, 39, 41, 43, 47, 49 Worm ratio: 90 T H N 1 90 2 45 3 30 4 A-16 22 8/16 5 18 6 15 7 B-21 12 18/21 8 A-16 11 4/16 9 10 10 9 11 B-33 8 6/33 12 A-16 7 8/16 13 C-39 6 36/39 14 B-21 6 9/21 15 6 16 A-16 5 10/16 17 A-17 5 5/17 18 5 19 A-19 4 14/19 ... 4410 C-49 1/49
Thanks Paul, it doesn’t surprise me there are errors, the chart looks like it’s a copy of a copy so you have to wonder if the manufacturer has ever checked it. I have to say it would be quite annoying if you discovered this in the last tooth of a gear or hole in a bolt circle on a finished part.
Thanks Paul, will keep a print out with my dividing plates, I’m sure it will come in handy. Maybe not the 4000 ones not sure I can fit that many teeth on a gear haha 😂. As I say I doubt the manufacturer checked them, probably copied from somewhere else and miss typed or worked out long ago on paper and copied ever since. Cheers Chris
@@SS-Workshop I'l try to toss a printout into Excel to make it a little more legible. I don't guarantee that all data are correct, even though I believe they are. You can always make a simple safety check before you cut out everything that is not a gear wheel. If the table says T ... N H/steps, then this equality shall be true: T*(N*H + steps) = 90*H (I suppose your worm ratio is 90). This property is of course checked in my code just before printout, but ... there might be a bug in the CPU. 🙂
I suggest you check with your tooling supplier, from a quick look online it doesn’t look like it as the 3” has a different hand wheel setup to the 4” & 6” which share the same dividing plates.
@@SS-Workshop www.chronos.ltd.uk/product/3-75-mm-vertical-horizontal-rotary-table/ How about this one? It's being sold from chronos and the handwheel seems quite similar as the hv4-6 series? It's a newer version than the other hv3. It doesn't have any description for dimensions though so I can only tell by the picture. Thanks
Great question, The dividing plate makes it easier to get specific divisions that may not be easily divided into degrees and the divisions provided on the rotary table. It really comes into play with gear cutting where you need a specific number of teeth.
A very nice presentation, well done!
I considered buying the Vertex HV-6 and looked up the user manual for it.
In that manual are tables for two sets of index discs (they call them plates).
The table for HV-6 with worm ratio 1:90 is denoted DP-1.
There are both typos, omissions and errors in this table.
(I have not yet checked the other table for the larger discs.)
It's tedious and error prone to check the tables by hand so I wrote
a computer program to compute a complete table, given a worm ratio and a
set of discs. The DP-1 set has a theoretical number of 234 different divisions
spanning from 1 to 4410. Not very practical for drilling hole circles,
but maybe very large divisions are useful for engraving patterns or similar?
An annoying fact is that 64 is missing in this set.
The printed table in the manual stops at 100 divisions. For larger divisions, the table becomes
more and more sparse. A snippet of a printout from the program follows below.
If there is interest, I can present the complete list in a follow up comment.
It should fit within the YT 10.00 character limit.
Key to the table headings:
T is the desired division
H is the disc and hole track to be used
N is the number of full turn cranks and stepped holes
Ex. To get a division of 7 (the bolt circle on Kontax Stirling Engines LTDs :-),
use the 21 hole circle on disc B and crank 12 full turns and 18 steps (holes)
for each division.
Disc A: 15, 16, 17, 18, 19, 20
Disc B: 21, 23, 27, 29, 31, 33
Disc C: 37, 39, 41, 43, 47, 49
Worm ratio: 90
T H N
1 90
2 45
3 30
4 A-16 22 8/16
5 18
6 15
7 B-21 12 18/21
8 A-16 11 4/16
9 10
10 9
11 B-33 8 6/33
12 A-16 7 8/16
13 C-39 6 36/39
14 B-21 6 9/21
15 6
16 A-16 5 10/16
17 A-17 5 5/17
18 5
19 A-19 4 14/19
...
4410 C-49 1/49
Thanks Paul, it doesn’t surprise me there are errors, the chart looks like it’s a copy of a copy so you have to wonder if the manufacturer has ever checked it. I have to say it would be quite annoying if you discovered this in the last tooth of a gear or hole in a bolt circle on a finished part.
@@SS-Workshop Thanks! Just for fun, here is the complete DP-1.
I have put an assertion condition in the code that checks
that each printed row contains the correct values.
The algorithm chooses the simplest possible quotient.
For example 8/16 instead of 10/20, because 16 is the
least even division on disc A. It should be easier and
safer to adjust the sector arms with fewer holes to count.
I found some surprising examples where they had
missed to reduce the quotient.
Disc A: 15, 16, 17, 18, 19, 20,
Disc B: 21, 23, 27, 29, 31, 33,
Disc C: 37, 39, 41, 43, 47, 49,
Worm ratio: 90
T H N
1 90
2 45
3 30
4 A-16 22 8/16
5 18
6 15
7 B-21 12 18/21
8 A-16 11 4/16
9 10
10 9
11 B-33 8 6/33
12 A-16 7 8/16
13 C-39 6 36/39
14 B-21 6 9/21
15 6
16 A-16 5 10/16
17 A-17 5 5/17
18 5
19 A-19 4 14/19
20 A-16 4 8/16
21 B-21 4 6/21
22 B-33 4 3/33
23 B-23 3 21/23
24 A-16 3 12/16
25 A-15 3 9/15
26 C-39 3 18/39
27 A-15 3 5/15
28
29 B-29 3 3/29
30 3
31 B-31 2 28/31
32 A-16 2 13/16
33 B-33 2 24/33
34 A-17 2 11/17
35 B-21 2 12/21
36 A-16 2 8/16
37 C-37 2 16/37
38 A-19 2 7/19
39 C-39 2 12/39
40 A-16 2 4/16
41 C-41 2 8/41
42 B-21 2 3/21
43 C-43 2 4/43
44
45 2
46 B-23 1 22/23
47 C-47 1 43/47
48 A-16 1 14/16
49 C-49 1 41/49
50 A-15 1 12/15
51 A-17 1 13/17
52
53
54 A-15 1 10/15
55 B-33 1 21/33
56
57 A-19 1 11/19
58 B-29 1 16/29
59
60 A-16 1 8/16
61
62 B-31 1 14/31
63 B-21 1 9/21
64
65 C-39 1 15/39
66 B-33 1 12/33
67
68
69 B-23 1 7/23
70 B-21 1 6/21
71
72 A-16 1 4/16
73
74 C-37 1 8/37
75 A-15 1 3/15
76
77
78 C-39 1 6/39
79
80 A-16 1 2/16
81 A-18 1 2/18
82 C-41 1 4/41
83
84
85 A-17 1 1/17
86 C-43 1 2/43
87 B-29 1 1/29
88
89
90 1
91
92
93 B-31 30/31
94 C-47 45/47
95 A-19 18/19
96 A-16 15/16
97
98 C-49 45/49
99 B-33 30/33
100 A-20 18/20
101
102 A-17 15/17
105 B-21 18/21
108 A-18 15/18
110 B-33 27/33
111 C-37 30/37
114 A-19 15/19
115 B-23 18/23
117 C-39 30/39
120 A-16 12/16
123 C-41 30/41
126 B-21 15/21
129 C-43 30/43
130 C-39 27/39
135 A-15 10/15
138 B-23 15/23
141 C-47 30/47
144 A-16 10/16
145 B-29 18/29
147 C-49 30/49
150 A-15 9/15
153 A-17 10/17
155 B-31 18/31
160 A-16 9/16
162 A-18 10/18
165 B-33 18/33
170 A-17 9/17
171 A-19 10/19
174 B-29 15/29
180 A-16 8/16
185 C-37 18/37
186 B-31 15/31
189 B-21 10/21
190 A-19 9/19
195 C-39 18/39
198 B-33 15/33
200 A-20 9/20
205 C-41 18/41
207 B-23 10/23
210 B-21 9/21
215 C-43 18/43
222 C-37 15/37
225 A-15 6/15
230 B-23 9/23
234 C-39 15/39
235 C-47 18/47
240 A-16 6/16
243 B-27 10/27
245 C-49 18/49
246 C-41 15/41
255 A-17 6/17
258 C-43 15/43
261 B-29 10/29
270 A-15 5/15
279 B-31 10/31
282 C-47 15/47
285 A-19 6/19
288 A-16 5/16
290 B-29 9/29
294 C-49 15/49
297 B-33 10/33
300 A-20 6/20
306 A-17 5/17
310 B-31 9/31
315 B-21 6/21
324 A-18 5/18
330 B-33 9/33
333 C-37 10/37
342 A-19 5/19
345 B-23 6/23
351 C-39 10/39
360 A-16 4/16
369 C-41 10/41
370 C-37 9/37
378 B-21 5/21
387 C-43 10/43
390 C-39 9/39
405 A-18 4/18
410 C-41 9/41
414 B-23 5/23
423 C-47 10/47
430 C-43 9/43
435 B-29 6/29
441 C-49 10/49
450 A-15 3/15
465 B-31 6/31
470 C-47 9/47
480 A-16 3/16
486 B-27 5/27
490 C-49 9/49
495 B-33 6/33
510 A-17 3/17
522 B-29 5/29
540 A-18 3/18
555 C-37 6/37
558 B-31 5/31
570 A-19 3/19
585 C-39 6/39
594 B-33 5/33
600 A-20 3/20
615 C-41 6/41
630 B-21 3/21
645 C-43 6/43
666 C-37 5/37
675 A-15 2/15
690 B-23 3/23
702 C-39 5/39
705 C-47 6/47
720 A-16 2/16
735 C-49 6/49
738 C-41 5/41
765 A-17 2/17
774 C-43 5/43
810 A-18 2/18
846 C-47 5/47
855 A-19 2/19
870 B-29 3/29
882 C-49 5/49
900 A-20 2/20
930 B-31 3/31
945 B-21 2/21
990 B-33 3/33
1035 B-23 2/23
1110 C-37 3/37
1170 C-39 3/39
1215 B-27 2/27
1230 C-41 3/41
1290 C-43 3/43
1305 B-29 2/29
1350 A-15 1/15
1395 B-31 2/31
1410 C-47 3/47
1440 A-16 1/16
1470 C-49 3/49
1485 B-33 2/33
1530 A-17 1/17
1620 A-18 1/18
1665 C-37 2/37
1710 A-19 1/19
1755 C-39 2/39
1800 A-20 1/20
1845 C-41 2/41
1890 B-21 1/21
1935 C-43 2/43
2070 B-23 1/23
2115 C-47 2/47
2205 C-49 2/49
2430 B-27 1/27
2610 B-29 1/29
2790 B-31 1/31
2970 B-33 1/33
3330 C-37 1/37
3510 C-39 1/39
3690 C-41 1/41
3870 C-43 1/43
4230 C-47 1/47
4410 C-49 1/49
Total number of divisions: 234
@@SS-Workshop (3d) This is bizarre! For 78 divisions they propose B-91 1 14/91. Why, when A-26 1 4/26 gives the same result?
Thanks Paul, will keep a print out with my dividing plates, I’m sure it will come in handy. Maybe not the 4000 ones not sure I can fit that many teeth on a gear haha 😂. As I say I doubt the manufacturer checked them, probably copied from somewhere else and miss typed or worked out long ago on paper and copied ever since. Cheers Chris
@@SS-Workshop I'l try to toss a printout into Excel to make it a little more legible. I don't guarantee that all data are correct, even though I believe they are. You can always make a simple safety check before you cut out everything that is not a gear wheel. If the table says T ... N H/steps, then this equality shall be true: T*(N*H + steps) = 90*H (I suppose your worm ratio is 90). This property is of course checked in my code just before printout, but ... there might be a bug in the CPU. 🙂
Hello, do you know if the Indexing plate kit for hv4 work with hv3 rotary table?
I suggest you check with your tooling supplier, from a quick look online it doesn’t look like it as the 3” has a different hand wheel setup to the 4” & 6” which share the same dividing plates.
@@SS-Workshop www.chronos.ltd.uk/product/3-75-mm-vertical-horizontal-rotary-table/
How about this one? It's being sold from chronos and the handwheel seems quite similar as the hv4-6 series? It's a newer version than the other hv3. It doesn't have any description for dimensions though so I can only tell by the picture. Thanks
Chronos in the UK sell an indexing set for HV3, HV4, HV5 and HV6 so theirs, at least, does.
Where did u buy the kit?
Hi Tom, My local machinery supplier, Machinery House (which is Hare and Forbes in Australia) offers this as an accessory to the vertex rotary tables.
The rotary table has degrees and seconds on the handwheel.......why would you need to install a dividing plate on it ????
Great question, The dividing plate makes it easier to get specific divisions that may not be easily divided into degrees and the divisions provided on the rotary table. It really comes into play with gear cutting where you need a specific number of teeth.
I can see that I guess.