--Hey has anyone ever worked on a Mutoh drafting machine? The head
on mine won't lock down any more; I suspect reducded tension in the
'forearm' band but can't figure out how to tighten it..
Aha -- a bit more detail. I went Googling for the machines last
night to see if I could determine enough about how they were made -- but
the photos all had too little detail.
I don't know the Mutoh drafting machines (only seen them in
Google work last night), but my BoardMaster has the band tension
adjusted by nuts threaded onto one half-arm and pressing against a
bushing around the other (unthreaded) half-arm. Obviously, you need to
adjust the nuts in both half-arms the same amount or the arm takes a
bend. Check whether yours has the same technique. I've seen some (K&E
IIRC) which had only a single central adjustable length arm, and just a
pair of plastic covers over the bands between the two hubs to keep them
clear of the draftsman's sleeves. The BoardMaster ran the bands through
the hollow tubes of both sides -- no center bar -- a better design in my
opinion.
I got mine from a surplus closeoout at a previous employer, and
the bushing was missing, and the band had broken at the very end where
the hole fits a clip on the opposite end of the band. There was
sufficient adjustment so I was able to punch a new hole and make up for
the loss in the range of adjustment of the nuts.
Good Luck,
DoN.
On Tue, 18 Nov 2008 10:05:37 -0800, the infamous Winston
scrawled the following:
As Jerry Maguire so eloquently said "SHOW ME THE MONEY!"
--
Latin: It's not just for geniuses any more.
--Not sure but I suspect they're all pretty much the same. I've
taken it apart from the top down, to where I've gotta get a 3/4" socket
on the big nut that holds the protractor assembly against the internal
bearing. I've already disassembled the bottom, where the spring detent
mechanism is located and all looks correct there; a little wear but nothing
significant.
I'm thinking, though, that the symptoms indicate something is wrong
with the band tension on the 'forearm': the tightening bar turns freely, as
if not threaded. Hope to tear into that section as soon as I can figure out
how to get access.
If/when I get home this weekend, Ill check my Mutohs. Ive got about 12
or so various drafting machines that Ive picked up over the last
couple years. Scales..now those can be a problem to find...sigh
Gunner
On Tue, 18 Nov 2008 20:38:03 -0800, the infamous Winston
scrawled the following:
Well, I'm watching. Didja fergit?
--
Latin: It's not just for geniuses any more.
Okay, I just sent it for the third time!
I used the address that was successful previously,
rather than your 'reply to' address.
Fingers, Toes and Eyes Crossed
--Winnie
> =A0 =A0 =A0 =A0 --Not sure but I suspect they're all pretty much the same= . I've
> taken it apart from the top down, to where I've gotta get a 3/4" socket
> on the big nut that holds the protractor assembly against the internal
> bearing. I've already disassembled the bottom, where the spring detent
> mechanism is located and all looks correct there; a little wear but nothi= ng
> significant.
> =A0 =A0 =A0 =A0 I'm thinking, though, that the symptoms indicate somethin= g is wrong
> with the band tension on the 'forearm': the tightening bar turns freely, = as
> if not threaded. Hope to tear into that section as soon as I can figure o= ut
> how to get access.
>
> --
> =A0 =A0 =A0 =A0 "Steamboat Ed" Haas =A0 =A0 =A0 =A0 : =A0Never thought I'= d live to see
> =A0 =A0 =A0 =A0 Hacking the Trailing Edge! =A0: =A0our "iron curtain" cru= mble...
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0www.nmpproducts.com
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0---Decks a-wash in a sea of words-=
If/when I get home this weekend, Ill check my Mutohs. Ive got about 12
or so various drafting machines that Ive picked up over the last
couple years. Scales..now those can be a problem to find...sigh
Gunner
I've got the non-parallel variety; i.e. the one with two arms connected with
a sort of 'watt parallel motion' mechanism, if you know what I mean. Sorta
like this one:
On Wed, 19 Nov 2008 14:57:36 -0800, the infamous Winston
scrawled the following:
Got it, 3 times. You delayed 'em on purpose, dincha?
--
Latin: It's not just for geniuses any more.
Naaaah.
First two were to your 'reply to' address.
They apparently got stuck in the pipe for a few hours.
Last one was to the address on your website.
It went through normally. (Skinnier bits?)
--Winston
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