Dividing Plates

[Neil WyattModerator @neilwyatt]

Posted by Andrew Tinsley on 28/11/2017 15:00:12:

Hello Neil,

I seem to remember that someone spotted an error in the table you refer to. I cannot work out if that error has been corrected or not. Can you confirm it is now as error free as possible?

Andrew

My recollection is that Howard corrected it, but I suggest sense-checking your results. You can also download his spreadsheet to see how they are derived.

[Andrew TinsleyParticipant @andrewtinsley63637]

Thanks Neil,

I will get the brain in gear and download the spreadsheet and check the suspect entry.

Regards,

Andrew.

[Andrew TinsleyParticipant @andrewtinsley63637]

Thanks Neil,

I will get the brain in gear and download the spreadsheet and check the suspect entry.

Regards,

Andrew.

[Howard LewisParticipant @howardlewis46836]

A little acccessory that has proved useful is home made pin to sit in in a hole behind one of the sector arms, once they have been clamped together. It lessens the chances of moving the sector arms accidentally.

F W I W, try to get into a sequence of actions, such as: unlocking the table, indexing, resetting the sector arms, turning the handle, locking the table, cutting.

If you have a memory, and powers of concentration like mine, you will need to! (not to mention lack of typing skills)

Howard

Edited By Howard Lewis on 29/11/2017 22:00:33

[Neil WyattModerator @neilwyatt]

My technique has been to use a 60-division dial with a 60-turn worm, so only 6-arc minute resolution.

I do a spread sheet that lets me know how many full turns and then what dial reading to carry on to. It requires much care and yes I do get too many cock-ups.

A stepper powered table is on the horizon. I bought and HV6 but I think it's too big to convert as it will be totally HUGE! But surprisingly nice so I will keep it, especially as I have a 10" gear coming up!

So will probably get a small 4" table for conversion.

[Brian WoodParticipant @brianwood45127]

Howard,

My home made pin started off as a golf tee, suitably slimmed down. I now use cocktail sticks, fiddly pins are easily lost and I just break off a length that suits clearance with the winding handle. The method has prevented a potential failure from lost position more than once; catching the sector arms with the handle and pin is all too easy

Brian

[Howard LewisParticipant @howardlewis46836]

Thank You Brian!

What a good idea. Must chat with some of my friends who play golf.

Much less likely to get lost than a bit if steel rod.

Howard

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