Thanks: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 46 to 48 of 48
Thread: Change Gears Again
-
24th Jan 2011, 07:23 PM #46Distracted Member
- Join Date
- May 2010
- Location
- Lower Lakes SA
- Age
- 58
- Posts
- 2,607
Something like this:
-
24th Jan 2011, 09:11 PM #47Golden Member
- Join Date
- Apr 2009
- Location
- Kingswood
- Posts
- 930
Bryan,
I did try to post with a copy of my spreadsheet(just love computers !), but yours is the same as mine.
Note that for the nominated metric threads, the errors are plus/minus.
I tried 61 and 59 teeth with the obvious systematic error one way or the other,
You are on to a solution now, leave it with you.
One thing, however, intrigues me; the presence of the 70 gear.
Is it possible that the 70 gear is part of the metric set ?
If 70 gear was on the QC input, the compound would have to be adjusted.
Instead of N/60 it would be N/(60x40/70) = N/34.2, say 34 teeth.
I have attached my spreadsheet showing the result.
Some better, some worse.
But, you can set it on the banjo/quadrant no problem.
The N/34 with N meshed to 70 could be the original design intent.
John.
-
24th Jan 2011, 10:14 PM #48Distracted Member
- Join Date
- May 2010
- Location
- Lower Lakes SA
- Age
- 58
- Posts
- 2,607
John, all I can tell you about the 70 is that it's intended to be an idler. It has no keyway or dowel hole or any way to drive anything.
That's a neat way to show the errors. I copied that on mine and got no more than .54%. Pretty happy with that. I also expanded the highlighting. Those two tables will cover diameters from 5-36 in coarse and 4-100 in fine. Oughta do me.
Similar Threads
-
Change Gears
By pipeclay in forum THE HERCUS AREAReplies: 0Last Post: 8th Oct 2009, 02:54 PM -
Hercus 260 Change Gears
By pipeclay in forum THE HERCUS AREAReplies: 2Last Post: 19th Aug 2009, 03:05 AM -
Chasing 2 x 36 Change gears
By bitza500 in forum THE HERCUS AREAReplies: 0Last Post: 12th Mar 2009, 02:59 PM -
Change gears for the Zyto
By jmk89 in forum METALWORK GENERALReplies: 3Last Post: 13th Nov 2008, 10:44 AM