SoliForum - 3D Printing Community — Left Laser not working

Re: Left Laser not working

null@example.com (slimstar2) — Sun, 24 May 2015 18:43:52 +0000

I had same problem as Pirvan ... bad crimp works now.

Re: Left Laser not working

null@example.com (pirvan) — Fri, 22 May 2015 22:58:28 +0000

I had a similar problem with my left laser, but in my case it turned out to be a loose wire.

The laser wires are short, so an extension wire was added to them. These wires are not soldered, rather they used a little piece of metal tubing, and crimped the wires inside, effectively an inline splice. Then added some shrink tubing over it.

Unfortunately on one of my lasers, these wires were very poorly crimped and loose. The only thing that was holding it in place was the heatshrink tubing. So I just twisted the ends together, then soldered them for good measure and covered them with shrink tubing, so now both my lasers work just fine.

Re: Left Laser not working

null@example.com (rjp350z) — Fri, 22 May 2015 13:12:34 +0000

Thanks Hairu - I've been using the original PI for quite some time now for testing other projects and may have inadvertently damaged it during one of my all night sessions.....

Re: Left Laser not working

null@example.com (hairu526) — Fri, 22 May 2015 00:18:00 +0000

I'm sorry to hear about the Pi but I'm glad you're up and running.

Re: Left Laser not working

null@example.com (rjp350z) — Thu, 21 May 2015 23:34:08 +0000

So far so good. Finally got both lasers working. wound up being faulty PI-2.
I replaced the PI and all is good. Now to finish the bed printing and final assembly

Re: Left Laser not working

null@example.com (hairu526) — Wed, 20 May 2015 00:18:44 +0000

Also, please double check your pin assignments on the Setup page and make sure that nothing else is using the same pin. The lasers should be on pins 4 and 5.

Re: Left Laser not working

null@example.com (rjp350z) — Tue, 19 May 2015 17:16:49 +0000

FaanP - will check that over the weekend currently traveling so no access to the units.

Thanks Hairu - will check that also over the weekend.

Re: Left Laser not working

null@example.com (FaanP) — Tue, 19 May 2015 05:41:53 +0000

Had similar problem with my build. It was a problem with that I/O on the Pi. I moved it to a different pin and all was ok.

Re: Left Laser not working

null@example.com (hairu526) — Sun, 17 May 2015 13:42:10 +0000

Can you send me a close-up photo of the bottom of the electronics board? Also, please check the ribbon cable connection to the Pi and the board. If the cable looks OK, then we need to test the Pi. Based on your earlier posts it sounds like you have a multimeter. If you also have a female to male jumper, can you test the voltage coming directly off that pin on the Pi?

Re: Left Laser not working

null@example.com (rjp350z) — Sun, 17 May 2015 13:28:24 +0000

ULN was seated correctly - even changed it out for a new one just for the hell of it.

Re: Left Laser not working

null@example.com (hairu526) — Sat, 16 May 2015 14:37:20 +0000

I wouldn't expect it to be the software. Can you check that the ULN2003A (the long black IC) is seated firmly?

Left Laser not working

null@example.com (rjp350z) — Sat, 16 May 2015 14:04:04 +0000

Hairu526,

finally got around to testing the BYOP kit. Having a problem with Left Laser. when turned on in software the pin won't go high I get only ~1.6-1.7 Vdc. Right laser works fine when sent high I get 4.34 VDC and all is good.

I tested both lasers independently and they both work fine so not actual Laser issue it seems to be an issue with the GPIO not going HIGH.

Should I be looking at possible hardware issue or could it be software? I built the software directly from GIT Src and didn't change anything other than HTTP port