Bonjour petite question, l’ancien propriétaire à mis des pinces crocodiles pour fixer l’anode et cathode du tube laser ça m’a l’air bizarre et pas isolée voir dangereux (risque d’arc?? ) qu’en pensez-vous ?
Quelle fixation conseillez vous ?
Hi @Josias
Original OP in English "The previous owner used crocodile clips to connect the anode and cathode of the laser tube. It seems a bit strange to me and isn’t insulated — possibly dangerous (risk of arcing??). What do you think?
What type of connection would you recommend?”"
D’après la photo, il semble s’agir de la connexion cathode/négative. À cette extrémité, il n’y a pas les mêmes exigences d’isolation haute tension qu’au niveau de l’anode, donc la pince crocodile n’est pas particulièrement inquiétante d’un point de vue électrique.
Cela dit, pour une installation permanente, je préférerais une connexion mécaniquement plus fiable sur la borne du tube, simplement parce qu’une pince peut se desserrer ou s’oxyder avec le temps.
L’anode, côté haute tension, est différente. Une pince crocodile ou une connexion exposée ne doit pas être utilisée à cet endroit. La connexion doit être solide et correctement isolée avec un connecteur ou un système d’isolation haute tension adapté aux tubes laser CO₂.
Si vous pouvez envoyer une photo de la connexion à l’autre extrémité du tube, nous pouvons aussi la
My reply in English.
The photo shows the cathode/negative connection. There is no high-voltage insulation requirement at this end in the same way there is at the anode, so the crocodile clip itself is not particularly concerning electrically.
That said, for a permanent installation I would prefer a more mechanically secure connection to the tube terminal rather than a crocodile clip, simply because clips can loosen or oxidize over time.
The anode/high-voltage end is different. A crocodile clip or exposed connection should not be used there. That connection needs to be secure and properly insulated using a suitable high-voltage connector/insulation system intended for CO₂ laser tubes.
If you can send a photo of the connection at the other end of the tube, we can check that as well.
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Merci il y a aussi une pince crocodile coté haute tension, alors je vais changer ça immédiatement. Merci
You must use a proper high voltage cable and insulation, because ordinary materials will not withstand the high voltage required to fire the laser tube.
Previous discussions will be helpful:
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Search EBAY for 703 or 704 high voltage silicone sealant. It is slow curing and does not outgas Acetic acid like standard RTV (room temp vulcanizing) which uses moisture to cure.
after coating the connection allow at least 24 hours to fully cure before even testing.
All examples on Amazon show boxes and tubes with Chinese text that translate as “Usage: This product is suitable for bonding various materials, insulating and sealing, household appliances, etc.”
Some product descriptions claim “high temperature”, a few say “electrical insulation for appliances”, but none mention “high voltage”.
Absent real documentation, I’d regard it as a low-end knockoff of a real product, subject to the usual counterfeiting and QC issues.
Reading the 3M information on their products is eye-opening: their definition of “medium voltage” goes up to 46 kV.
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Quand je lis les conseils sur la colle isolante haute tension, j’imagine la colle au pistolet est à éviter ?
Hot-melt glue is an adhesive. It is not rated for any electrical application.
Some idea of what’s required:
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I buy these for inline connection, from Amazon.
Where the tubes anode voltage connects, it’s a relatively small rubber boot and the anode wire was already attached.
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