perm filename FRED1.VL[1,VDS] blob sn#157535
filedate 1975-04-30 generic text, type C, neo UTF8
COMMENT ⊗ VALID 00002 PAGES
C REC PAGE DESCRIPTION
C00002 00002 \\M1BDR25\M2SIGN57\M3NGR25\M4NGR20\F2\CVICARM
\F3\C154 EAST DANA STREET
\CMOUNTAIN VIEW, CA. 94041
\F1\CMay 1, 1975
Enclosed are the drawings for the optical encoder decoder and
counter cards. It would be really neat if you could fit everything
on one long size, double height DEC size card. That way, there would
be a minimum number of buss wires outside of the card. According to
my count, that amounts to 26 DIPS. The count goes as so. 1-
7400,1-7414,1-7410,1-7404,5-7474,5-8234,8-8284,2-74153, 2-74123. Now
this may be too much to expect. If you feel that you would like to
make a less dense layout, do so. This can be done by either going to
a larger P.C. board, say like Dave Bailey used with 100 pin
connectors which can be used for jumpers if necessary. Or else you
can put it on more than one board, but in that case the number of
dips goes up, as I have tried to minimize package count with this
layout. Good luck.
In another package, I have enclosed the arm drawings. These
are the most up to date versions I have at the present time. I have
not yet incorporated some of the design changes made while you were
here, but will do so shortly. In any event, you should be able to
get all the necessary info from these. Please guard these carefully,
as I would not like them to get duplicated and passed around too
much. If you need another set, let me know, and I can supply one.
I've made an internal stop for joint #3 and it seems
allright. I have also made a slip clutch for joint #5, so that if it
hits it's stop it doesnt loosen or damage the bevel gear set. I'll
know shortly whether it works or not.
I will be making a decision on the arm interface shortly, and
will let you know the verdict. At the price you and Dave
quoted, I hope that your system will be really good. I like the idea
of an entirely P.C. version. I'm all turned on to printed circuits
now. As its easy to run up a big bill at a commercial P.C. house, I
am still interested in setting up a facility at Vicarm. Could you
send me the address of Dynachem, and possibly a catalog. You also
mentioned something about getting the gold plating solution from
another source. Give me their name too. Of course, I would also not
refuse a small bottle or two of some of the hard to come by stuff.
Russel has not yet shown up with your boards. I talked with
him today. He says that he will finish things up this weekend and I
should have the entire supply by about May 10. I've aged about 50
years in the past 6 months worrying about this whole operation.
Here's hoping that I'll survive. No word from Tech yet. Maybe you
can cay something to George. Like ask him if he needs a delivery
receipt, or whatnot. I assume that the proper people in purchasing
or receiving know that the arms arrived there.
By the way, how are they doing? I hope that your wiring is
working well. I am still a bit dubious about its fatigue life. Let
me know of any problems please.
I cashed your personal check for $100, but I would like to
get something official for the $150 paid to you for the connector
boards. I'll think about how I want to do it. Possibly we will
figure it all out when you send the encoder board layout and the
Dont forget to file your income tax returns. Remember, that
extension was just for the federal govt. Check with Massachusetts as
to their requirements.
If Russel is really right this time, I should be around
M.I.T. sometime about the 20th of May. See you then.\.