Axial Capacitors at tme.eu - Page 1
Forum section: electronics / projects

author: cs.dk
author_rank: Unknown
timestamp: January 03, 2020, 08:33:38 am
content: It seems liketme.euhave a very small collection of axial capacitors. Only 85C rated ones, and from SR Passives. Anyone know about SR Passives?They are for a weldingmachine that is acting up (Migatronic Automig 200) - I'll check the power resistors, diodes and similar "easy to test components". The small trannies looks good visually. Other things to check now I got it on the table?Forgot to mention. When the main relay is energized, the gasvalve clicks/buzz at a rather high rate, and it gets to hot to touch in seconds. The valve it self a 24VAC one. What could make that happen?

author: Yansi
author_rank: Super Contributor
timestamp: January 03, 2020, 10:35:01 am
content: How hard it is to check the voltage at the gas valve?

author: wraper
author_rank: Unknown
timestamp: January 03, 2020, 10:53:42 am
content: SR passives is their own brand. Like Multicomp of Farnell. Who actually manufactured it is mystery. You could only look if some real manufacturer has datasheet (if there is any) that looks the same, except branding. If you are lucky, if you buy capacitor it could have actual manufacturer marking on it.

author: wraper
author_rank: Unknown
timestamp: January 03, 2020, 11:12:11 am
content: BTW tme sells nichicon axial caps as well.

author: Terry01
author_rank: Frequent Contributor
timestamp: January 03, 2020, 12:22:48 pm
content: What are those small grey coloured components with the blue ends and also the dark grey coloured rectangle ones with the green centres?I've never seen that type before.

author: wraper
author_rank: Unknown
timestamp: January 03, 2020, 12:38:09 pm
content: Quote from: Terry01 on January 03, 2020, 12:22:48 pmFilm capacitorsQuoteResistors, most likely wire-wound.

author: David Hess
author_rank: Super Contributor
timestamp: January 03, 2020, 01:40:11 pm
content: The selection of axial capacitors is much more limited than the selection of radial capacitors and they are more expensive. I tend to replace axial capacitors with radial ones and insulate and bend one lead around to the top.

author: Yansi
author_rank: Super Contributor
timestamp: January 03, 2020, 02:09:53 pm
content: Sure, but are you sure the caps are even the fault? OP still hasn't responded yet, nor did he/she did the basic troubleshooting likely.Transistors looking good is not enough.

author: cs.dk
author_rank: Unknown
timestamp: January 03, 2020, 04:08:49 pm
content: Quote from: Yansi on January 03, 2020, 02:09:53 pmQuote from: Yansi on January 03, 2020, 10:35:01 amNo, i'm not sure. The valve heats up quite quick, so i have 20-30 sec to measure. - Thats why I'm asking here.. And thanks for your aggressive pointing fingers..Thanks to all others that repliedI won't do any further today.

author: mariush
author_rank: Super Contributor
timestamp: January 03, 2020, 05:01:18 pm
content: I'd just use regular radial capacitor, and use a bit of heatshrink to insulate one of the leads (or use a longer wire for the 2nd lead).

author: mikerj
author_rank: Super Contributor
timestamp: January 03, 2020, 05:56:19 pm
content: The gas valve and motor feed are powered from a separate 24v transformer, so either the transformer is wired incorrectly (i.e. powered from 240v but transformer primary configured for 110v) or the gas valve solenoid has shorted turns and if drawing way too much current.Possibly useful thread onmig-welding.co.ukregarding common failures.

author: Yansi
author_rank: Super Contributor
timestamp: January 03, 2020, 06:00:57 pm
content: Quote from: cs.dk on January 03, 2020, 04:08:49 pmThat's not pointing fingers, that's basic troubleshooting. Without even having the voltage at the solenoid measured, what do you expect us to tell you? We can make a guess at best, as mikerj said: Either wrong voltage or shorted coil.20seconds are plenty enough to measure voltage. Even 5 seconds are enough for a multimeter value to stabilize for a readout.