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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Hello all,
We just got this retired WA20 wavemeter donated to our lab from Los Alamos. I haven't cracked the case open yet but when I plug it in I hear a revving noise which I'm guessing is a bad belt. Considering the cost of these machines as well as their sensitivity I was hoping to find somebody with a tech manual I can go over before I start this project. EXFO, the company that acquired Burleigh doesn't have any documentation on their site available. I'm going to phone them but I'm guessing I'll come up empty handed... this has been discontinued for too long I guess. So... before I bite the bullet and open this up I wanted to gather as much info as I could.... has anybody here ever repaired the belt in these things? Any tips? Alternatively, does anybody have or have access to a tech manual? Thanks for reading, -Matthew |
#3
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Broken Burleigh WA20-VIS (I know Sam has used these before)
On May 22, 5:53 am, Sam Goldwasser wrote:
writes: We just got this retired WA20 wavemeter donated to our lab from Los Alamos. I haven't cracked the case open yet but when I plug it in I hear a revving noise which I'm guessing is a bad belt. Considering the cost of these machines as well as their sensitivity I was hoping to find somebody with a tech manual I can go over before I start this project. Open the bottom. Most likely, you'll find the belt stretched out and sitting on the bottom cover. Replace it with anything that fits and you'll be good to go. An elastic band will work well enough to test it. EXFO, the company that acquired Burleigh doesn't have any documentation on their site available. I'm going to phone them but I'm guessing I'll come up empty handed... this has been discontinued for too long I guess. So... before I bite the bullet and open this up I wanted to gather as much info as I could.... has anybody here ever repaired the belt in these things? Any tips? Alternatively, does anybody have or have access to a tech manual? http://repairfaq.cis.upenn.edu/Misc/...h/WA-10_20.pdf It's a wonderful machine. I just wish it was about 1/10th the size! --- sam | Sci.Electronics.Repair FAQ:http://www.repairfaq.org/ Repair | Main Table of Contents:http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ:http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites:http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. Thanks Sam, Opened it up and, just as your suggested, the belt was lying there. The noise is caused by the motor running without tension. Next problem: somebody got pump oil all over the vacuum chamber... but I know how to correct that. Cheers, -Matthew |
#4
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Matthew Karam writes:
On May 22, 5:53 am, Sam Goldwasser wrote: writes: We just got this retired WA20 wavemeter donated to our lab from Los Alamos. I haven't cracked the case open yet but when I plug it in I hear a revving noise which I'm guessing is a bad belt. Considering the cost of these machines as well as their sensitivity I was hoping to find somebody with a tech manual I can go over before I start this project. Open the bottom. Most likely, you'll find the belt stretched out and sitting on the bottom cover. Replace it with anything that fits and you'll be good to go. An elastic band will work well enough to test it. EXFO, the company that acquired Burleigh doesn't have any documentation on their site available. I'm going to phone them but I'm guessing I'll come up empty handed... this has been discontinued for too long I guess. So... before I bite the bullet and open this up I wanted to gather as much info as I could.... has anybody here ever repaired the belt in these things? Any tips? Alternatively, does anybody have or have access to a tech manual? http://repairfaq.cis.upenn.edu/Misc/...h/WA-10_20.pdf It's a wonderful machine. I just wish it was about 1/10th the size! --- sam | Sci.Electronics.Repair FAQ:http://www.repairfaq.org/ Thanks Sam, Opened it up and, just as your suggested, the belt was lying there. The noise is caused by the motor running without tension. Next problem: somebody got pump oil all over the vacuum chamber... but I know how to correct that. Yeah, probably left it connected to the pump with power off and forgot to close the valve. Take care cleaning the optical components (if they got oiled as well). While it's open, you might as well do the alignment described in the manual. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#5
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Alright... I got the new belts thanks to McMaster's fast shipping
(hats off to those guys, always so quick). Now my next big problem: the motor is broken. It should be easy enough to replace. Judging from how this machine works, I don't suppose that it's dependant on the speed on the motor. It's just counting and comparing fringes... I'm thinking I'll try to put a little graphite into the existing motor but my guess is that I'm going to need to replace it. I'll take it out, plug in a volt meter and see if I can find another motor hat runs about the same speed on the same juice. Ugh, what a pain. Any ideas? |
#6
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Broken Burleigh WA20-VIS (I know Sam has used these before)
And to top things off.... it's a 120 volt motor sync motor. Gonna be
fun to find a replacement for this. On May 27, 1:47 pm, Matthew Karam wrote: Alright... I got the new belts thanks to McMaster's fast shipping (hats off to those guys, always so quick). Now my next big problem: the motor is broken. It should be easy enough to replace. Judging from how this machine works, I don't suppose that it's dependant on the speed on the motor. It's just counting and comparing fringes... I'm thinking I'll try to put a little graphite into the existing motor but my guess is that I'm going to need to replace it. I'll take it out, plug in a volt meter and see if I can find another motor hat runs about the same speed on the same juice. Ugh, what a pain. Any ideas? |
#7
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Broken Burleigh WA20-VIS (I know Sam has used these before)
I spoke too soon. I took apart the motor, cleaned out all the bits of
broken magnet dust and gave it a little oil. It's spinning like a champ now. On May 27, 1:52 pm, Matthew Karam wrote: And to top things off.... it's a 120 volt motor sync motor. Gonna be fun to find a replacement for this. On May 27, 1:47 pm, Matthew Karam wrote: Alright... I got the new belts thanks to McMaster's fast shipping (hats off to those guys, always so quick). Now my next big problem: the motor is broken. It should be easy enough to replace. Judging from how this machine works, I don't suppose that it's dependant on the speed on the motor. It's just counting and comparing fringes... I'm thinking I'll try to put a little graphite into the existing motor but my guess is that I'm going to need to replace it. I'll take it out, plug in a volt meter and see if I can find another motor hat runs about the same speed on the same juice. Ugh, what a pain. Any ideas? |
#8
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Broken Burleigh WA20-VIS (I know Sam has used these before)
What do you mean: "broken". Doesn't run or makes a lot of noise or what?
Cleaning and lubing the bearings might cure the latter. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. Matthew Karam writes: And to top things off.... it's a 120 volt motor sync motor. Gonna be fun to find a replacement for this. On May 27, 1:47 pm, Matthew Karam wrote: Alright... I got the new belts thanks to McMaster's fast shipping (hats off to those guys, always so quick). Now my next big problem: the motor is broken. It should be easy enough to replace. Judging from how this machine works, I don't suppose that it's dependant on the speed on the motor. It's just counting and comparing fringes... I'm thinking I'll try to put a little graphite into the existing motor but my guess is that I'm going to need to replace it. I'll take it out, plug in a volt meter and see if I can find another motor hat runs about the same speed on the same juice. Ugh, what a pain. Any ideas? |
#9
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Broken Burleigh WA20-VIS (I know Sam has used these before)
See?
--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. Matthew Karam writes: I spoke too soon. I took apart the motor, cleaned out all the bits of broken magnet dust and gave it a little oil. It's spinning like a champ now. On May 27, 1:52 pm, Matthew Karam wrote: And to top things off.... it's a 120 volt motor sync motor. Gonna be fun to find a replacement for this. On May 27, 1:47 pm, Matthew Karam wrote: Alright... I got the new belts thanks to McMaster's fast shipping (hats off to those guys, always so quick). Now my next big problem: the motor is broken. It should be easy enough to replace. Judging from how this machine works, I don't suppose that it's dependant on the speed on the motor. It's just counting and comparing fringes... I'm thinking I'll try to put a little graphite into the existing motor but my guess is that I'm going to need to replace it. I'll take it out, plug in a volt meter and see if I can find another motor hat runs about the same speed on the same juice. Ugh, what a pain. Any ideas? |
#10
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Yup, the reference is working now. All the optics are aligned...
adequately. The output doesn't give me anything that looks like a nice sine wave, but that's all in the screws |
#11
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Matthew Karam writes:
Yup, the reference is working now. All the optics are aligned... adequately. The output doesn't give me anything that looks like a nice sine wave, but that's all in the screws And the pump oil residue?..... What do you mean by "the reference is working now" beyond the HeNe laser being on? --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#12
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Broken Burleigh WA20-VIS (I know Sam has used these before)
The vac chamber is clean with the help of kim wipes and ethanol (the
manual explicitly says not to use acetone). I mean the REF ERROR light is off, so the HeNe is working *and* the alignment is ok. On May 28, 5:51 am, Sam Goldwasser wrote: Matthew Karam writes: Yup, the reference is working now. All the optics are aligned... adequately. The output doesn't give me anything that looks like a nice sine wave, but that's all in the screws And the pump oil residue?..... What do you mean by "the reference is working now" beyond the HeNe laser being on? --- sam | Sci.Electronics.Repair FAQ:http://www.repairfaq.org/ Repair | Main Table of Contents:http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ:http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites:http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#13
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Matthew Karam writes:
The vac chamber is clean with the help of kim wipes and ethanol (the manual explicitly says not to use acetone). Yeah, because I guess the optics will fall apart. I mean the REF ERROR light is off, so the HeNe is working *and* the alignment is ok. There's not much else to go wrong. If you push the test button, do you get the HeNe wavelength? --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#14
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Broken Burleigh WA20-VIS (I know Sam has used these before)
I do get the HeNe wavelength with the test button. My task for today is to shoot in another reference laser and verify that the wavelength is reported properly. Thanks again for all your help, Sam. This would have been a major pain without your help and your manual.... do you just keep archives of these things? On May 28, 5:01 pm, Sam Goldwasser wrote: Matthew Karam writes: The vac chamber is clean with the help of kim wipes and ethanol (the manual explicitly says not to use acetone). Yeah, because I guess the optics will fall apart. I mean the REF ERROR light is off, so the HeNe is working *and* the alignment is ok. There's not much else to go wrong. If you push the test button, do you get the HeNe wavelength? --- sam | Sci.Electronics.Repair FAQ:http://www.repairfaq.org/ Repair | Main Table of Contents:http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ:http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites:http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#15
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Broken Burleigh WA20-VIS (I know Sam has used these before)
Matthew Karam writes:
I do get the HeNe wavelength with the test button. My task for today is to shoot in another reference laser and verify that the wavelength is reported properly. The beauty of this thing is that once you get that to work, almost everything else *has* to work. It may not be optimally aligned but should be close. Thanks again for all your help, Sam. This would have been a major pain without your help and your manual.... do you just keep archives of these things? Yeah, somewhat randomly archived across various Web sites. Thanks! --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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