Electronics for New Machine + Chinese Spindle + VFD

[cropwell]

14pin 10A 24v relay sockets seem to be rarer than hens teeth.

Look at AC3592 on page 138

http://asp-gb.secure-zone.net/v2/index.jsp?id=1816/2360/9875&lng=en&startPage=138

[mturneruk]

Thanks Cropwell - That base only has a contact rating of 6A. This is a 10A relay.
They do exist, but i can't really be bothered to buy / wait. Is there any reason why I can't solder the connections and heatshrink?
I trust solder over screw terminals.

[komatias]

Just a small comment on the solder vs crimping or screwing.

In high vibration environments such as in aircraft, drilling tools and military vehicles, it has been found that solder joints are more likely to fail. The solder wicks up into the cable and causes a hidden stress concentration and a slight heat affected zone in the copper. Also tin whiskers as discussed here: http://www.aviationtoday.com/av/comm...ers_76599.html

Depending on your application, my recommendation would be to see if you can crimp a ferrule boot on to the cables and use screw terminals. Also to note, some screw terminals are not meant to take a soldered cable in them.

[mekanik]

http://www.aviationtoday.com/av/comm...ers_76599.html
A very interesting yet disturbing read, thanks for that
Regards
Mike

[cropwell]

If you buy solder from China, it is generally 63/37 Sn/Pb, which avoids the whiskering problem. Commercially you can't use it, but as an amateur you are not bound by recent regulations to industry. If you are not soldering all day and everyday the risk is low.

Most spindle connector plugs have to have soldered joints and I would recommend that you use at leat a 50W iron with a large bit. Low wattage irons and small bits don't transfer heat quickly enough to stop the heat soak up the wire. The faster you can solder a joint (at the correct temperature) the better.

To echo and amplify the remarks of Komatias, you will need to cut down the joint flexing as it is more likely to fail at the solder due to embrittlement of the wire. If you can fit a flex limiting sheath (several layers of heat shrink will help) then you increase the radius of curvature at the flexing point.

Cheers,

Rob


https://www.gore.com/en_xx/products/cables/flat/highflex/flat_cable_hi_flex_apps_tech_background_document.h tml