The little HF pocket model goes on sale for $9.95 now and then. It is surprisingly repeatable. We use it to test for cool spots on 5 gallon batches of a dispersion we mix up. It does easily detect .1° F differences, although we only need to know to about 3 or 4°.
Pete Stanaitis
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Morris Dovey wrote:
I wonder now, ;~) what the temp of the bit is during actual cutting. I wonder if possibly the bit cools down substantially by running at 14,000 rpm between the time of the completed cut and when you turn the router off. Either way I agree that faster feed speed helps in keeping the bit cooler.
That reading was taken while the bit was cutting.
One of the nice things about CNC routing is the "no hands" aspect that left me free to aim the thermometer at the part of the bit down in the dado while it was cutting (moving away from me).
Around the quill there's a home-made dust shroud - you can see it near the bottom of
I have more of this stuff to cut tomorrow, so I'll get more readings...
That might be the case up to a point in some materials, but when cutting acrylic at high speeds, it heats up the bit rather than cooling it off. Material choice, feed rate, spindle speed and bit design all enter into this complex equation. The chips are supposed to carry away heat as well. One of the people at the CNC workshop was burning her maple till the instructor backed off the spindle rpm but kept the feed rate the same. That worked much better. I'm told that aluminum is a biatch in that regard. It's all about chip removal.
that reference.
Check item 3, 5 and 6 here:
And my thanks to *all* our Canadian neighbors to buy US products of
*any* flavor! We need the business. :-|I do not know who coined those epithets, but, this is one Canuck who = never heard the word used in that fashion. Musta bin sum dam Yankee
P D Q
that reference.
Check item 3, 5 and 6 here:
r heard the word used in that fashion. =A0Musta bin sum dam Yankee
The term Pepsi is more a local Quebec phenomena. It is not as widespread as 'frog'.
never heard the word used in that fashion. Musta bin sum dam Yankee
The term Pepsi is more a local Quebec phenomena. It is not as widespread as 'frog'.
"Robatoy" wrote
I suppose it wasn't fair to assume that my American friends would get that reference.
Check item 3, 5 and 6 here:
You finally gave us an Urban Dictionary definition that had nothing to do with a blatantly sexual reference.
Geting old??
Okay, here is what you do: stand up in an east Montreal bar, near the docks, and yell out: "any pepsis in here?"
And you WILL get confirmation that the term exists and that it is derogatory.
(Make sure you have an ambulance waiting.)
I'm doing what I can to behave myself, but some stuff is just too funny not to share.
Almost enough to make me think it originated with the FLQ generation.
P D Q
And whatever you do, don't look up what a 'rusty trombone' is.
It's tomorrow already. :-)
I reinstalled the dull bit (not a particularly good move, but I was curious) and cut four MDO parts with it. The highest temperature I could record while cutting was 105.3F - with most of the readings scattered between 92 and 97F.
I put an adhesive red dot on the bit and set it aside for sharpening - and made a note to myself not to try cutting more than one sheet of MDO with a single bit. :-(
How about exterra? [sp?]
Extira is great stuff for signage because of its moisture resistance, but otherwise it has all the characteristics of MDF. I thought about it and decided that people deserve better.
I don't mind using up bits -- actually I mind /not/ using up bits -- and am going to be looking for a better grade of weather-resistant plywood.
What I'd really like is nice 3/4", 4x8 sheets of acrylic-faced 11-ply baltic birch (or even non-baltic non-birch) made with a machine-friendly exterior glue, that I don't have to buy by the container load.
It may be about time for Mason Pan to open a store here in Iowa...
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