On Tue, 30 Apr 2013 18:53:39 -0000, you wrote:
>The Ultrakeet super-fuser mods sounded interesting: https://ultrakeet.com.au/write-ups/superFuserV2
>
>Especially since the Royal Sovereign CS-923 is of similar design and available for around $25 from Amazon. Problem is, the CS-923 has three thermostat switches instead of two, and Ultrakeet doesn't provide much technical information (or respond to emails). The 3 thermal switches are rated at 110, 120, and 140 deg. C and his modification is to replace one of the 2 switches in his Lowell unit with a new 160 deg. C switch to raise the operating temperature. Does anyone know which one should be replaced?
I'll guess the 140 degree one.
>
>I think these switches have normally-closed contacts, but if the first one that opens breaks the flow of current (i.e. the lowest temperature), then what's the point of the others? (One of the two lower temp switches is selected by a rocker switch corresponding to 3 and 5 mil pouches). This might be a good solution for toner transfer, but simple as it is, I'm a little puzzled about how to increase the operating temp. Suggestions would be welcomed!
>
The temperatures seem to be either 110 or 120 degrees selectable by
switch, with the 140 degree being an "OMG" switch to protect the
entire laminator. Just replacing the 140 with a 160 wouldn't help,
since the lower temp switches take precedence. I'd think you also
have to remove one of the lower temp switches (just take it out and
bypass it entirely, I'd think the 110 one. That way you have 120 and
160. If you want 140 and 160, then replace the 110 with the 160,
bypass the 110 position entirely, wire the 140 in place of the 120, so
you have:
1) in the 5 mil position, you have 140 degrees with a 160 safety.
2) in the 3 mil position, you have 160 degrees with no safety other
than that one switch.
May make sense to you to reverse the 3 and 5 mil position, so that 3
mil is the 140 and 5 mil is the 160 (only).
Harvey
>Bob