Steve,
Are you changing out the chain as well as the sprockets? Depending on
the load on the chain, it will stretch and need to be replaced. There
should be a spec on the allowable % elongation on the chain. What our
maintenance department will do is remove a link or two. The problem
is, the pitch of the chain will no longer match up to the pitch of the
sprocket. This will cause wear on the sprocket. Measure the chain and
replace it at the same time as the sprocket.
Regards,
Scott B.
-----Original Message-----
From: Stephen R. Gregory <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Tuesday, March 09, 1999 7:21 PM
Subject: [TN] My Wave Solder is getting fixed...


>Hey Ya'll,
>
>My wave solder is getting fixed (...and the crowd goes wild!). Soltec
flew in
>a gentleman named Jorge (not george, it's hor-hay) and he's taking
care of me
>now. Turns out that the problem had to do with the sprocket bearings
down at
>the entrance end of the machine, they had gotten flux in there over
the months
>(they're pretty close to the foam stone)...and as you know, flux
ain't too hot
>a lubricant.
>
>Gonna change the drive sprockets too....they got "pointy teeth" from
the added
>drag of the flux lubricated bearings at the other end of the machine.
I'm
>gonna get me some plastic inserts to cover the openings where the
bearings are
>because I can see how easy it is to get flux in there when your flux
density
>is on the thick side...you know, when it's like shaving cream that
has the big
>air pockets that "bloop" up and send drops of flux flying all over
the place.
>
>I'm gonna air a little dirty laundry of my own here, in the hope that
someone
>else reads this in the future, and will prevent getting themselves in
the same
>predicament that I did. I've kinda' prided myself in being creative
and
>resourceful, someone who can take what's given him and make do with
it. This
>time it blew up in my face. Let me say this first;
>
>"YOU'VE PAID A LOT OF MONEY FOR YOUR EQUIPMENT, YOU'VE GOT TO TAKE
CARE OF IT
>ON A REGULAR BASIS!"
>
>"Hell Steve, that ain't rocket science, we all know that..." some of
you maybe
>musing now. But you'd be suprised how many places buy a few machines,
hire
>some operators, and then run them for 24/7. When a machine breaks
down
>everybody is scratching their heads like what the heck happened?
Duhhh!! GET A
>CLUE!
>
>What cracks me up is that a person will go and spend $80,000 for a
Lexus or
>similar car, and baby that thing like you wouldn't believe. Oil is
changed
>like clockwork every 2,000 miles, nothing but hand car washes, don't
even
>think about lighting a cigarette up in it, and a cover for it in the
trunk so
>it can be covered if they're ever caught outside without shelter for
the
>vehicle. What's really ironic is that the same people will go out and
spend
>$100,000, $200,000, or $500,000 or more for a piece of production
equipment,
>but when you try to take the same sort of care and make
recommendations of how
>the machines should be cared for, it's either; "There isn't enough
time", or
>it's "Too expensive"...and here we are... So, what's it costing now?
>
>I think I did this to myself. Tried to do anything and everything
with a piece
>of bubble gum and some baling wire because I've always known that in
start-ups
>you had to be frugal. No problem with that, I can make do on a
shoestring for
>a little while, but I can't do it forever...something has to give,
and
>unfortunately our poor ol' wave solder bearings did...something that
I
>overlooked trying to do the 10,000 other things that I try to do
every day.
>
>I know I'm hangin' it out here with this email...but I don't know any
other
>way to be other than up front. I think there's a really good lesson
here for
>people looking at what I'm going through...if anybody wants to take
it. I know
>that there's a lot of you that have been/are in in this same sort of
>situation...this is nothing new, and the results from this kind of
situation
>are nothing new either. Ya' gots ta' take care of your machines
dammit!
>
>-Steve Gregory-
>
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