RE: ATM gears and such

[<dpitou@ix.netcom.com>]

Hi Peter,

I didn't use the tap method, but one FAR more tedious - I cut the teeth
one-at-a-time on a mill using a hand made cutter. The average error
(periodic + tooth-to-tooth) is 6 arc seconds with a sigma of 1.5 arc
seconds.

Dave

-----Original Message-----
From: owner-atm@shore.net [mailto:owner-atm@shore.net]On Behalf Of Peter
Sent: Thursday, January 15, 2004 4:18 AM
To: Dave Gault; ATM
Subject: RE: ATM gears and such



To all Gear Makers out there who did their own:

I'd like to know how did your home made gears work out? Have you measured
the periodic error and if yes what was it?

Thanks,

Peter

-----Original Message-----
From: owner-atm@shore.net [mailto:owner-atm@shore.net]On Behalf Of Dave
Gault
Sent: Thursday, January 15, 2004 3:18 AM
To: ATM
Subject: Re: ATM gears and such



G'day all,

pjifl@bigpond.com.au wrote:

<snip>
>They would cut a little cleaner than a tap because they have
>proper clearance behind the cutting edge.  But ground thread
>helical taps do work quite well.

I have a webpage on the cutting of my worm wheels using the old "tap in
the chuck and plunge the plank in method".

my url is onder my sig and just nav. to the "German Equatorial Mount -
Part 1. The Drives" page

--
Regards
Dave
http://www4.tpgi.com.au/users/daveg/index.html