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http://www.yqcomputer.com/

Jon Banquer
San Diego, CA

On Wed, 11 Jun 2008 05:44:06 -0700 (PDT), jon_banquer < XXXX@XXXXX.COM >




http://www.yqcomputer.com/

WHAT A HOOT !!

[
First Suggestion:

Teach how to program the depth of countersinks. You do this by showing how deep
to program a 60-degree, an 82-degree, a 90-degree a 100-degree or a 120-degree
countersink. List the multiplication factors for each .001 of programmed Z
depth.

Example:

The multiplication factor for a 120-degree countersink is .288 and for each .001
of programmed Z depth the countersink will increase .0035.

Lets say we need to program a 120-degree countersink that needs to be .375 in
diameter.

The calculation is as follows:

.288 x .375 = .108

-.108 is what you would program as the Z depth in your CAM program to get your
.375 diameter 120-degree countersink.

What also should be mentioned is that the setup person needs to measure the
countersink and raise the tool because the countersink doesn come to sharp
point and the diameter of the flat has to be taken into account and the tool
raised up.

Second Suggestion:

When programming small holes you often want your lead in-lead out to start in
the middle of the hole. The formula to do this is:

Hole Diameter - Tool Diameter / 2

In Mastercam you would enter this number in the Lead In-Lead Out dialog box
under Length Input.

Much more coming soon!
]

I really hope so !!!
--
Cliff

He's had to learn this stuff the HARD way. These are his SECRETS !!!


Why not bananas?


A chart to memorize for each?


How long a list should they learn by rote for each?
Which numbers will be on the test?


Gee, clueless, this is just (.375/2)/tan(60 degrees) or
(.375/2)*cotangent(60 degrees).
Or (diameter/2)*cotangent(of half the included angle).

You don't need any stinking charts for every .001" of depth
for FOUR DIFFERENT TOOLS!!

The students had best have this simple shop math *before being
admitted to the school/class* !!!

And what has it to do with CNC anyway? Even manual machinists
need simple shop math !!! So do a lot of other people, just
not banquers, eh?


Gee, clueless, *the setup person*?
"Raised up" from where, exactly? How much?

What about setting the tool to the *end* if you know the diameter
of the flat (see spec or measure) or using a ring guage or a tool setter?


Why not use a drill?

How did you get to the "middle of the hole"?


<GAK>
Go to center of hole (for a finish milling pass) with cutter comp
off (centerline programming) THEN turn on cutter comp &
move ro the cutting surface?


Gee, what if the students are using GibbsCAM or something else?


Have lots more fancy formulas? How about some for BobCad?

--
Cliff

When you don't have time to waste on the shop floor and are looking
for quicker solutions they can be found here:

http://www.yqcomputer.com/

Jon Banquer
San Diego, CA

Demand a 16 hour video of those charts so that every time you need to
countersink a hole you can watch the video again to get the correct
number from the chart.
--
Cliff

When you don't have time to waste on the shop floor and are looking
for quicker solutions they can be found here:

http://www.yqcomputer.com/

Jon Banquer
San Diego, CA

On Thu, 12 Jun 2008 05:48:15 -0700 (PDT), jon_banquer < XXXX@XXXXX.COM >



Demand a 16 hour video of those charts so that every time you need to
countersink a hole you can watch the video again to get the correct
number from the chart.
--
Cliff

On Thu, 12 Jun 2008 05:40:59 -0700 (PDT), jon_banquer < XXXX@XXXXX.COM >



Demand a 16 hour video of those charts so that every time you need to
countersink a hole you can watch the video again to get the correct
number from the chart.
--
Cliff

When you don't have time to waste on the shop floor and are looking
for quicker solutions they can be found here:

http://www.yqcomputer.com/

Jon Banquer
San Diego, CA

Solutions? To what? All you do is *** and whine.Give us a single
"solution" that was your idea without copy/pasting.

Daisy.



** Posted from http://www.yqcomputer.com/ **

What solutions? CAM books for use on the shop floor? I haven't opened
a Mastercam book in YEARS. It helps to have some idea of what you're
doing, before you show up on the "shop floor" trying to work. The only
thing worse would be to show up on the "shop floor" carrying a bunch
of Mastercam manuals.

On Fri, 13 Jun 2008 05:12:24 -0700 (PDT), jon_banquer < XXXX@XXXXX.COM >



Q: Why did the little moron move to the city?
A: Because he heard the country might go to war.

HTH
--
Cliff

I really liked the idea of memorizing charts of the results of
simple trig functions for every .001" & many different angles.
You could spend years drilling all those numbers into the
heads of students by rote (or buy pretty crayon-coloured laminated
pictures of right triangles to go with the charts from jb I suppose).

One little moron asked another little moron: Did you just take a shower?
Second little moron: Why, is one missing?
--
Cliff

On Wed, 11 Jun 2008 05:44:06 -0700 (PDT), jon_banquer < XXXX@XXXXX.COM >



http://www.yqcomputer.com/
[
Starting with Chapter 6 the focus should move to programming this real world
part out of a chunk of say T6-6061 aluminum. That means the first thing we need
to do is create a bounding box that has extra material and set up a WCS at the
upper left or right corner of the bounding box. This would be on the solid jaw
of the vise. I feel that this is the best place to properly describe what the
WCS is all about and how to use it. Make sure that at a later point when the
front of the Servo Housing is going to be machined that using the Relative
Button in the WCS View Manager is explained and used in the example. This is
also the best place to talk about the fact that the WCS arrows must align to how
the part is going to sit on the machine / vise. This is never made clear in any
documentation I have read! Neither is a good explanation of what the Relative
button is for! How about we start machining this part using a Facing Toolpath
because if I were programming and making this part I would face the stock first.
]

Last I knew most such parts are usually dimensioned from the datums
which are usually the lower left of the plan view of the part *as shown*.

Perhaps you have your vise on backwards or are using a horizontal <VBG>.
Or the stock is already of proper thickness or you are going to machine
the entire top surface off later anyway ....

Q: Why does the little moron save burned-out light bulbs?
A: So he can use them in his darkroom.
--
Cliff

When you don't have time to waste on the shop floor and are looking
for quicker solutions they can be found here:

http://www.yqcomputer.com/

Jon Banquer
San Diego, CA