POTD- PROJECT OF THE DAY: What Did You Make In Your Shop Today?

[dkemppai]

112mW of green is hazardous to the eye, never mind the IR. Why did you choose such a high powered device, it wasn't for this use was it? I mean it is pretty neat and all, but it's not needed for using on an optical flat, is it? Very nice set up, though.

The advertisement was 50mW, measured 112. The 405nm was 205mW, advertised as 200.

The IR leakage should be filtered out. But I don't trust the Chinese, so this will get an IR filter before the diffuser for the final go.

Yes, I did choose it for this application. You have to remember 100mW in a pinpoint is a lot. But as soon as you run a diffuser, and spread it in every direction it's not much at all. Actually it's not really enough light for this application, spread over a spherical area. But it was the absolute cheapest monochromatic light source that could be made. (Even low pressure sodium bulbs are going for over $100 now!)

For comparison, the light cast from that green pingpong ball is drowned out by 400 lux of white room lighting when the ball is 6" from a sheet of paper. It's enough to see interference patterns on the flats, but room lighting needs to be off.

In general, you are correct, you need to be careful with lasers. And unless you know what you are doing, just don't. Especially with unknown import stuff showing up on ebay.

Actually, I brought a bunch of laser pointers to the power meter when I tested these. The little chinese pointers in blue and green you get for $3 tested at 45mW and 40mW ea! They're supposed to be under 5mW! A red presentation pointer was about 1mW.

I do have some 2000mW and 7000mW 455nm blues, now those are scary dangerous.

 

[matthewsx]

He learned to speak German in Berlin, as a High School Rotary Exchange student, so he has the local accent. Nobody realizes he is American.

Before his Exchange experience, I had no idea that there were regional accents in Germany. Apparently, they are quite pronounced.

My wife lived in Munich and learned to speak proper German in adult school there. When she went to the store they acted like they couldn’t understand what she was saying.

 

[GoceKU]

Today i got one of those calls from my brother. I think i blow the turbo again, this car got a replacement turbocharger few months ago because of blown oil seals. I wasn't the one replacing it but who ever did it did not drain the intercooler or the new turbo has the same issue. Also i don't know what he got close to but the rear door got a close brash at speed. The real reason for all the noise that sounded like the turbo blow was the piping blow off. I reattached it and used some bailing wire to hold it down, i also drain the intercooler and found the fan belt has jumped the shared one ribb all that combine is telling me someone has swirly over reward this engine, i told my brother to take it easy on it i don't want to put another engine in it.

 

[mattthemuppet2]

Work is continuing on the Humongous Fungus. When I replaced the CV axles I noticed that the ball joint boots were gone or going, do I got some new ones and new control arm bushings.

Made a couple of wedges to pop off the ball joints, they worked really well

Finally got the dang control arm out (had to unbolt the sub frame floor )


Then pressed out the old ball joint and front bushing, then cut off the rear bushing. Had to make a piece to press the new bushing in


Took the whole weekend to do one side, with lots of cursing. Took a couple of hours today to do the other


Also put on new front disks and pads, didn't much like the feel of the old ones even though they still had some life left

 

[WobblyHand]

Work is continuing on the Humongous Fungus. When I replaced the CV axles I noticed that the ball joint boots were gone or going, do I got some new ones and new control arm bushings.

Made a couple of wedges to pop off the ball joints, they worked really wellView attachment 437962View attachment 437963View attachment 437964

Finally got the dang control arm out (had to unbolt the sub frame floor )
View attachment 437965

Then pressed out the old ball joint and front bushing, then cut off the rear bushing. Had to make a piece to press the new bushing in
View attachment 437966View attachment 437967View attachment 437968

Took the whole weekend to do one side, with lots of cursing. Took a couple of hours today to do the other
View attachment 437969View attachment 437970

Also put on new front disks and pads, didn't much like the feel of the old ones even though they still had some life leftView attachment 437971

There's always one side or wheel that gives you grief on a vehicle.

I fought for a day and a half to get off a shock absorber because the weld on the nut to the frame broke. Of course it was inside the frame, which meant I had no access to it, except when the shock was out. All the other shocks came out in a couple of minutes. There's always one that wants to be special.

 

[dkemppai]

There's always one side or wheel that gives you grief on a vehicle.

You probably live in a rust belt area too...

For us, it's the drivers side EVERYTHING! Oncoming traffic throws more salted-snow-slop on the drivers side. That means everything worse on that side! I hate salt...

 

[WobblyHand]

You probably live in a rust belt area too...

For us, it's the drivers side EVERYTHING! Oncoming traffic throws more salted-snow-slop on the drivers side. That means everything worse on that side! I hate salt...

Yes, it's a rust belt region here. Salt is not good for vehicles, or the water supply. It can clear the roads though. Pretty much a mixed blessing. In unsalted regions folks learn very quickly not to travel faster than the road conditions permit.

 

[great white]

Today i got one of those calls from my brother. I think i blow the turbo again, this car got a replacement turbocharger few months ago because of blown oil seals. I wasn't the one replacing it but who ever did it did not drain the intercooler or the new turbo has the same issue. Also i don't know what he got close to but the rear door got a close brash at speed. The real reason for all the noise that sounded like the turbo blow was the piping blow off. I reattached it and used some bailing wire to hold it down, i also drain the intercooler and found the fan belt has jumped the shared one ribb all that combine is telling me someone has swirly over reward this engine, i told my brother to take it easy on it i don't want to put another engine in it.
View attachment 437891View attachment 437892View attachment 437893View attachment 437894View attachment 437895View attachment 437896

Serpentine belts don't do that unless there's something pretty wrong. I'd look at pulley alignments or possibly, a bearing going bad in the belt drive system somewhere....

 

[GoceKU]

Serpentine belts don't do that unless there's something pretty wrong. I'd look at pulley alignments or possibly, a bearing going bad in the belt drive system somewhere....

Everything is fine with the alignment of all the pulleys, all the bearings and the shock absorber on the tensioner is fine, even has a new clutch on the alternator. It's all down to my brother's driving or even worse when he lent it to his friends or colleagues. Someone miss shifted or went 3rd,4th,3rd it being a diesel with 24 bar cylinder compression they throw the accessories belt or jump a tooth and at that rpm just shreds the belt or what is hanging off. That is one of the reasons why i prefer the old style belt system where the mechanic sets the tension and there is less chance to jump a tooth.

 

[great white]

Everything is fine with the alignment of all the pulleys, all the bearings and the shock absorber on the tensioner is fine, even has a new clutch on the alternator. It's all down to my brother's driving or even worse when he lent it to his friends or colleagues. Someone miss shifted or went 3rd,4th,3rd it being a diesel with 24 bar cylinder compression they throw the accessories belt or jump a tooth and at that rpm just shreds the belt or what is hanging off. That is one of the reasons why i prefer the old style belt system where the mechanic sets the tension and there is less chance to jump a tooth.

V belts are inferior in many ways to sepentine.

They still won’t do what you have in your pictures unless theres an alignment or mechanical problems.

I’m very familiar with diesels. I used to build and tune them. Little ones and big ones.

To get enough rpm to toss an accessory belt…well, you’d be looking at a window in the block before it will toss a serpentine.

my comment stands: theres something amiss in the accessory drive to shred a belt like that. Assuming the belt isn’t really old that is. By old I mean a decade or more and closer to a couple decades.

Of course, theres always the possibility it was installed one rib off and has just shredded itself.

Anyways, thats my advice. Take it or leave it, no hard feelings wither way.