14 Dec
2014
14 Dec
'14
9:25 a.m.
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who could
do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the mechanics
and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
14 Dec
14 Dec
9:12 p.m.
On 12/14/2014 9:25 AM, Simon Claessen wrote:
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who
could do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the
mechanics and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
Simon,
did you come up with a copy of this book, and not just the cover? Is it
distributable by the datamuseum? I'd like a copy in case I get to try
to restore my 101.
I'd let you have mine to use for a reference, but we are too far apart.
I'd love to see one more running event if it isn't mine.
Did you snag any data cards?
thanks
Jim
15 Dec
15 Dec
2:29 a.m.
we have one datacard but the rollers in the reader are gone to goo.
Fixing that is the last thing on my mind at the moment. :-) the diameter
of the rubber rollers on our version with the geared printer drive
(older versions had a separate belt) is +/- 12mm.
I've taken the electronics module apart as I want to find out where the
clock is generated or derived from as there is no xtal on the machine
and there is no ac from the psu going to the electronics.
On 15-12-14 06:12, jwsmobile wrote:
On 12/14/2014 9:25 AM, Simon Claessen wrote:
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who
could do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the
mechanics and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
Simon,
did you come up with a copy of this book, and not just the cover? Is it
distributable by the datamuseum? I'd like a copy in case I get to try
to restore my 101.
I'd let you have mine to use for a reference, but we are too far apart.
I'd love to see one more running event if it isn't mine.
Did you snag any data cards?
thanks
Jim
6:32 a.m.
Simon C. wrote:
I've taken the electronics module apart as I want
to find out where the clock
is generated or derived from as there is no xtal on the machine and there is
no ac from the psu going to the electronics.
The clock is likely derived from a simple R/C oscillator, with some buffer drivers
on the output(s) to provide enough drive current to feed the clocked logic of the machine.
No crystal is really needed.
Variations in clock speed over time isn't really a big deal with electronic
calculators. The key thing is that the designs based on delay lines usually have some
kind of timing bit(s) that are injected into the delay line that help sync the timing of
the delay line with the rest of the clocked logic.
Most old electronic calculators had main clock speeds (which was generally always divided
down to various phases) in the 40KhZ to 100KHz range. Even at these modest speeds, it
was easy for the machines to be much faster than the mechanical machines that they very
quickly made obsolete.
-Rick Bensene
17 Dec
17 Dec
3:09 a.m.
Hey all,
Good news! I've located the problems with the machine and already have
fixed the mechanical part. The elctrical problem is bad contacts in the
edge connectors (a mere 850 pins...) and I got my first calculating
results on paper in the form of the square root of 6. :-)
So ignore my earlier post on the scope probe path
updates of course on the blog.
On 14-12-14 18:25, Simon Claessen wrote:
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who could
do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the mechanics
and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
7 Jan
7 Jan
2:41 p.m.
well,
Good news always has some bad news as well. After careful examining of
the 952 (no, not 850...) pins, I found 52 broken ones. As they are made
of a gold plated springy metal wire, I needed to find a replacement.
Size: 0,5mm diameter.
Guitar wires are out. They are way to flexible. I opted for fosfor
bronze wire, but could not find it in the shops in Amsterdam. Then I
stubled upon a shop selling beads and stuff to make bracelets and
earrings. They sell "memory wire", A very tough silver coated wire of
0.6mm. I have no idea what the alloy is, but the mechanical
characteristics are not bad.
The first clip I made fitted surprisingly good. now to find some time to
bend another 51...
Oh well.
On 17-12-14 12:09, Simon Claessen wrote:
Hey all,
Good news! I've located the problems with the machine and already have
fixed the mechanical part. The elctrical problem is bad contacts in the
edge connectors (a mere 850 pins...) and I got my first calculating
results on paper in the form of the square root of 6. :-)
So ignore my earlier post on the scope probe path
updates of course on the blog.
On 14-12-14 18:25, Simon Claessen wrote:
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who could
do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the mechanics
and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
3:21 p.m.
On 01/07/2015 02:41 PM, Simon Claessen wrote:
well,
Good news always has some bad news as well. After careful examining of
the 952 (no, not 850...) pins, I found 52 broken ones. As they are made
of a gold plated springy metal wire, I needed to find a replacement.
Size: 0,5mm diameter.
Guitar wires are out. They are way to flexible. I opted for fosfor
bronze wire, but could not find it in the shops in Amsterdam. Then I
stubled upon a shop selling beads and stuff to make bracelets and
earrings. They sell "memory wire", A very tough silver coated wire of
0.6mm. I have no idea what the alloy is, but the mechanical
characteristics are not bad.
Drop in to a good musical instrument repair shop. Flutes, for instance,
use phosphor bronze wire springs; clarinets tend to use stainless steel
springs; dulcimer wire is typically phosphor bronze. I've even used
harpsichord bronze wire to fashion pins to convert a SIMM to a SIPP. It
solders well.
An instrument repair shop is also an excellent place to fine flat blue
steel springs.
--Chuck
13 Feb
13 Feb
6:10 a.m.
Hello all,
well, i've remade 53 clips for the backplane, but unfortunately things
do not inprove. Its even wors now. I can get no reaction from the
electronics at all. I suspect that not only my clips are wrong, but with
every insert of a card, other clips are starting to break apart.
for now i've shelved the project and I will look at a way to let all
clips produced somewhere. fortunately, there is a business in bending
metal not far away.
writeup on my efforts up till now:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
simon
On 14-12-14 18:25, Simon Claessen wrote:
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who could
do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the mechanics
and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
3917
days inactive
3978
days old
7 comments
4 participants
participants (4)
-
cclist＠sydex.com -
jws＠jwsss.com -
rickb＠bensene.com -
simski＠dds.nl