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| 'Living with an old Synchro' and other tales from my shed. |
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| Pete.:
On the metric Synchro there should be a stack of five gears on a bolt under the end cover. Six gears in total (five on the bolt and one on the banjo) stamped A-G and you choose the right gear according to the threading chart. |
| DavidA:
Pete. My Synchro is Imperial. I did have one of those 'so that's how it works' moments today while looking at the gear train. As I mentioned, the machine has 48 Imperial pitch choices. From 4 tpi to 28 tpi and then another range to cover the rest. I just worked out how it does this. On the banjo there is a sliding gear. it normally gives a straight through 1:1 drive to the gearbox. If you slide this 'quad gear' out into it's other position it changes the the ratio to 8:1 . So all the lower tpi are multiplied by 8 to give 32 tpi to 224 tpi. Neat! I just wish it had a clutch reversing system. Save all the stop - start on the motor. But I suppose you can't have everything on one machine. Dave. Typo edit |
| Pete.:
I knew it was imperial I just didn't realise the imperial machine does without the swappable gears. It would be great to get some photos of the drivetrain and screwcutting chart I can't find a single example despite extensive searching. |
| awemawson:
.... ah photos .... now there's a good idea .... Dave :scratch: :scratch: :scratch: :scratch: :lol: :lol: :lol: |
| DavidA:
Even as you read this I am trying to get my camera (Fuji Finepix S3000) running so that I can use it'sMacro facility to get some pictures. This camera has something of an unreliability history, and I don't altogether trust it. I do have a variety of other cameras, but non that will let me get really close. Dave. |
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