sweep & table contactors

[Brunsamf]

I have repaired worn out A.B. upper contact points with silver solder, both upper & lower (start contacts). I use a pencil torch & after fileing & cleaning old surface, quickly heat and apply silver solder & spray with water as not to burn up the plastic. Then I file to about.100ths. I've some in the chassis for over a year and no problems at all. This is a 12 lane high lineage house too. Has anyone else done this? BTW, we use Omega Tech boards.

[Rep]

Re: sweep & table contactors

Brunsamf, very interesting. We never tried doing that. We've just been installing the Siemens ones with the push-buttons to replace the old allen bradleys. Neat idea to try tho, I think I may give it a shot [img]/content/btubb/images/%%GRAEMLIN_URL%%/smile.gif[/img]

Rep [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img]

[8270king]

Re: sweep & table contactors

Just put in the Bowltronics units.

The problem is the new contacts fly apart which inturn blows the capacitors.

They always fly apart during Saturday night when I do not want to come and repair something.

JMO

Jerry

[Jimmy Jam]

Re: sweep & table contactors

I wonder if this place sells them? <a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank"><a href="http://www.motorcontrols.com/Contacts.htm" target="_blank">http://www.motorcontrols.com/Contacts.htm</a></a></a></a></a></a></a></a></a>

[TheGMan143]

Re: sweep &amp; table contactors

I've been touching up contacts and National motor start switches like that for a while... they work as good as new. The only thing I had to do was find a high-silver content solder... the "silver-bearing" tin solder tends to melt if the contacts arc a bit, and they stick together. I found that high-silver content jewelry solder works good. On the old AB's, doing this can save a bunch of money.

The only thing I do differently is that I remove the contact pads from the bakelite carriers so I don't damage them with the heat.