Damn Martin!! Those are some real nice looking pics! You make yourself a 'light-box'?,
or (
did you have a photo studio built onto your house, lol). Either way, I forsee some
fiiiiiiine lock-porn cumming from you from now on
MartinHewitt wrote:After a closer look on the photos in Mark Bates' book I believe the Sun 700 is not a friction fence lock. While it is generally constructed like e.g. your Yale, I do see something which could be a spring and I don't see any gears.Oldfast wrote:.....now that I'm taking a close look, you're absolutely correct... there is no gear and is not driven by friction. It is clearly a spring-loaded fence. The more technically correct term might be a 'spring-loaded roller fence'?
At a quick glance, it easily appears to be a knock-off OC5. And thing is... I've heard some very experienced safe-techs not only refer to it as a 'friction-fence', but even mention that there will be only one contact point when manipulating....
So
you know this, and
I now in turn know it... but I think it's worth repeating that the 700 is
not a friction-fence lock. Nor is the 6705, or the Yale 062 1/2 on
this Mosler-Bahmann. But I see how these can easily be mistaken as such. You see a gear or two. You see the familiar Yale-looking lever... yet they're not driven by friction, but by spring pressure.
Your nice clean/clear photos of the 700 make the spring quite obvious. Not so much with the 062 1/2 though. Look closer and you'll see a spring-loaded plunger that drives the fence. That plunger in itself is not enough to bring the fence fully into the gates though. That's actually accomplished mostly by the drive cam when its' gate catches the fence and pulls it in.
We should really differentiate this type of lever/fence into a class of its'
own. I dunno if this is the correct term, or if a proper one already exists (
if so let's hear it), but I've been calling this type a '
spring-loaded roller fence'. The
standard spring-loaded lever '
drops' into the gates. Whereas the
friction-fence '
rotates/pivots'
into the gates as it's pulled in via the drive cam. The 'roller fence' shares characteristics from
both these types, but again, is really something in its' own right - especially when we're looking at it in terms of manipulation.
MartinHewitt wrote:More about the Sun 700.
Open in 3 1/4 hours. It is stopping at 9 when opening. The right contact point is not so useful. There is a point where the right CP doesn't get better. At this point it is difficult or even impossible to turn over the right CP. But the left CP can be optimized to the end.
MartinHewitt wrote:It looks so harmless and it is easy to make graphs, but somehow the gates hide. I am now 4 hours into my second manipulation, but so far only a few candidates for gates on all wheels and the lock won't open. Are real friction fence locks the same? Is there also an bottom line on the right CP?
MartinHewitt wrote:PS: Gate width is 4 numbers. Quite a lot.
PPS: Left CP 96-97, Right CP 0-2.
You're getting your money's worth then
As to your question on the difficulties that 700 is giving you and whether or not the same challenges occur in friction-fence locks?
Sure they do. But not
always. Sometimes it can be a much more straight forward process. No different than many other locks really; some can be really difficult to wring out the gates, and others are much easier.
So you say the LCP (96) is giving you the most useful information? That's good to know. Gosh, I wish I could remember what CP I used on that 062 1/2... but I didn't always keep the best of notes at that time.
Also, I can't help but wonder what affect it has on your Sun 700 to have a Yale driver in it rather than the original. It could be making it easier. Could be making it more difficult. Hard to say. Would've been nice to have the driver that belongs in it.
p.s. Oh, and the friction-fence lock in the magic module footprint? I'm not sure.