Shopsmith Forums

Gene Howe wrote:It ain't age, Dusty. I've had that problem since I smashed my Tinkertoy set.

OTOH, THE 'SHORTY' IS ASSEMBLED and it works!!!

Pictures please.

[quote="charlese"]Oh yes he does!!]

Back when I worked for McDonnell-Douglas, one of my jobs was troubleshooting the loading circuits, in the cargo bays. (Under your feet.) Since I had a hobby of refurbishing old pinball machines, which used relay banks to do the "thinking," I was able to figure out the relay banks running the loading circuits.

None of the "engineers" could follow simple relay schematics, for some reason. They were all used to transistor controlled stuff, but not mechanical switching.

steve

skou wrote:Back when I worked for McDonnell-Douglas, one of my jobs was troubleshooting the loading circuits, in the cargo bays. (Under your feet.) Since I had a hobby of refurbishing old pinball machines, which used relay banks to do the "thinking," I was able to figure out the relay banks running the loading circuits.

None of the "engineers" could follow simple relay schematics, for some reason. They were all used to transistor controlled stuff, but not mechanical switching.

steve

ladder diagrams, or something else?

Either way a timing chart is a must!

skou wrote:Back when I worked for McDonnell-Douglas, one of my jobs was troubleshooting the loading circuits, in the cargo bays. (Under your feet.) Since I had a hobby of refurbishing old pinball machines, which used relay banks to do the "thinking," I was able to figure out the relay banks running the loading circuits.

None of the "engineers" could follow simple relay schematics, for some reason. They were all used to transistor controlled stuff, but not mechanical switching.

steve

That was new kid engineers, the old engineers all knew relay logic circuits. That is what all the old tabulating machines that IBM made were. Machines like the keypunch, 519 calculator and sorter all used relay logic circuits to do all the math and decision making of the machine.

Loved to trouble shoot relay problems. When you found the problem you could also see it. Not with IC card where once you found the bad card all you knew was the problem was somewhere in one of the two thousand plus circuits in one of the 2OO IC chips on the card.

My first engineering supervisor was an old Philco/Ford guy. He had a great story on the Mercury Cougars of the late 60s. They had the Sequential turn-signals, quite a stylish feature, on the back. All that stuff was controlled electronically with Triac semiconductors.

But... at the last minute, they learned the Triacs dropped a bit too much voltage from the battery-rail to the voltages at the individual sequenced bulbs. Looked fine in operation, but didn't meet Federal regulations. The solution? Each and every car was retrofitted with a cluster of light-bulb relays. The Triacs just drove the relays instead of the bulbs. Then the bulbs had enough drive-voltage to meet the regulations.

Bill,
As soon as I can figure out how to load the film in the camera, I'll get some pictures.
Heard about this new camera that develops it's own film. gotta check that out!:D

Well, got the camera loaded.

Here's pics to prove my mechanical genius.

These views were helpful, but having the other SS handy for reference was better.[ATTACH]22569[/ATTACH]

Cute little thing. [ATTACH]22570[/ATTACH]

It'll be just fine in the DP mode. [ATTACH]22571[/ATTACH]

As soon as I get it 12" down onto the concrete floor, I'll put the casters on.
It's going to most often be setting behind it's longer brother. I'll use it for an outfeed table for ripping. Otherwise, it'll be a DP, BS, DS, or dado (IBox) machine.

Thanks again, Bill.

nuhobby wrote:My first engineering supervisor was an old Philco/Ford guy. He had a great story on the Mercury Cougars of the late 60s. They had the Sequential turn-signals, quite a stylish feature, on the back. All that stuff was controlled electronically with Triac semiconductors.

But... at the last minute, they learned the Triacs dropped a bit too much voltage from the battery-rail to the voltages at the individual sequenced bulbs. Looked fine in operation, but didn't meet Federal regulations. The solution? Each and every car was retrofitted with a cluster of light-bulb relays. The Triacs just drove the relays instead of the bulbs. Then the bulbs had enough drive-voltage to meet the regulations.

65 Tbird had a motor driven cam switch. A relay turned turned the brake lights on. Three light sequence each side. Rest position lit all three so brake lights would work(all six!)

P.S. sure they were not SCRs?