Check this out! Now out! Authentic and real practise questions with
score and natural simulations of your post utme. Introducing -
ELECTRONIC TEST COMPANY {ETC}
Now, maybe you don't know but the actual company behind University
of Ilorin post utme is called Electronic Test Company- ETC. When the
post utme started they had a portal for free practice questions so as
familiarise students with the Online Exams stuffs. The portal has been
forgotten and left out of publications whereas it wasn't so before. In
fact, I remember now that it was always part of registration details of
Unilorin Post utme before. It was there to help students but was left
out last post utme and this one's registration details.
But Now! It's out and here again! Test your knowledge of what you're
gonna do during your test in the post utme- with all the real ways and
methods of doing it. In fact, the questions are even alike. We're so
sure it'll help you and that's why we are bringing it to your notice.
I'll advise you to do the test yourself and not with calculator. Try
and do it as if you're writing the post utme itself. Do not ask for
help from anyone. The system gives you 25 minutes and I'll implore you
to use it wisely, don't use facebook along side with it, neither should
you use any other website. Just focus your 25 minutes online to it. You
can even do it on your phone! So what are you waiting for?!
All said nicely. Now go over and click on share below to share with
friends who are writing the post utme on facebook and twitter then click
on the Link Below to go to JKKETC'S website to do the test. Your score
shows how prepared you are for the exam, you can still make amends now
before the D- day.
|| http://test.jkketc.net ||
please share with friends by clicking the share button below. For
those using opera mobile- when you click, it'll take you to a page, just
move up, you'll see facebook, twitter and email there. Just pick anyone
you're sharing with.
Wishing you the very best!
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1. Historical perspective of CAM.
CNC milling machines have of course been developed based on conventional
milling
machines, where the tool is moved through the material by operating a
hand wheel for each of
the available axes (X, Y, Z, ...). The basis of adding NC (Numerical
Control) is very simple:
replace the hand wheel by a positioning motor and add some electronics
(the NC controller) to
control the position. Nowadays many conversion kits are available to
perform such operation.
The first NC controllers were very simple: no user-interface, just an
option to read the toolpositions to go to from a punched
2. The position of CAM Software in the process.
In order to manufacture a part, nowadays typically three different
software programs are used
(see the illustration above):
- First the CAD software to make the design of the part
- Next de CAM software to calculate the toolpaths based on the design,
compensating for the
cutter’s geometry, adding feedrate and spindle commands, etc
- Third the control software to read the toolpaths and let the machine
actually move along
these paths.
This subdivision of tasks by three different programs is the same for
both 2D and 3D
applications.
The Control software comes with the milling machine, while in contrast
the CAD and the CAM
software have to be bought separately. In case an NC controller with
built in special purpose
computer is used, the Control software is integrated. In case of a PC
the Control software has2
to be installed, still it ’belongs’ to the machine as the machine cannot
function without the
Control software. Do note that many lowcost CNC machines are delivered
with MS Dos based
Control software, as the realtime control needed for machining is
difficult to program under
Windows.
Communication between the three programs is done using files. From CAD
to CAM the
design is transferred using a file format for geometry data exchange.
For instance file types
like IGES, STL and STEP for 3D, DXF for both 2D and 3D, and Postscript
and HPGL for 2D
applications. These are standard formats that in most (!) cases can be
used without any
special configuring needed. Much more can be said about these file
types. Perhaps an idea
for a next article of the month I won’t add any explanations here.
Communication from CAD to Control software is done using NC program
files, for which many
formats do exist. In most cases the format will be a (minor) variation
on the ISO / DIN G-code
format.
3. Types of CAM software.
Many different CAM software packages are available, showing large
differences in price. It is
a very difficult job to get a clear view about each system’s
capabilities and it’s
price/performance ratio. The CAM software comparison table on this
website is a great help,
still only doing some real-life testing gives good evaluation
information. To give some
guidelines for choosing, two basic categorizations can be made.
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