Jack wrote
A thumb width is about an inch and about 2.54cm.
You sure its about 2.54mm and not 2.55mm? My thumb is maybe
wider than yours this illustrates one of the
sillinesses of our use of the metric system - 1 inch is a
good approximation but 2.54mm is not an approximation, its a
back that metric is scientific measurement because it is
a part of the
circumference of the world. That may matter to a map
maker but I don't
That's very unscientific definition of metric system and
makes no sense
in reality.
In actual fact, the metre has no relationship to any
Andy Pugh wrote:
without borrowing the international
prototype meter.
What's one of those Andy? ;-) - Oh, maybe you mean Metre and
not something for measuring with... time someone
standardised the 'English' language ( and yes, I did
spell 'standardised' correctly!)
I think you will
Jack wrote...
We could just go computer and do it all in binary,
or to be more succinct in
hexadecimal.
Why do programmers always get Christmas and Halloween mixed up?
Because DEC 25 = OCT 31
Ian
--
Crystal Reports -
Jack wrote: Would it also help if we did the same for
time and went to a decimal clock
with 10 hours per day and 100 minutes per hour...
The French tried it during the French Revolution when it was
mandated by a decree on 5 Oct 1793. It was brought into use
in 1794 and abandoned in 1795
Thanks for these links guys - I'll follow them up..
Best wishes,
Ian
---
Ian W Wright
Sheffield UK
--
Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
is a gathering of
Hi,
I'm looking for inspiration as to how I can use a 12 volt
6-8 Amp motor
to drive my mini-mill spindle. I'm currently using an old
mains voltage
teleprinter motor which, although it does the job admirably,
is as noisy
as hell and I have to leave the room while it screeches
away. I've now
Sounds like time to dust off the old moonshine still;-)
Ian
--
Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
is a gathering of tech-side developers brand creativity professionals. Meet
the
Jim Fleig wrote:PS (My attempt to replace a previous
version of Ubuntu with 8.04 has resulted in the following
error message: Disk Boot Failure, Insert System Disk and
Press Enter. Prior to installing the 8.04 version the hard
drive was scrubbed with DBAN. I have tried several things
Hi,
I'm considering cnc'ing my Harrison Lathe and have a couple of steppers
which will do the job nicely. However, they take about 4.5AMPs and I'm
having difficulty finding a driver circuit to control them with. Due to
very limited funds I'd like to build the drivers myself and I'm thinking
HI,
I just rebuilt a PC which had died and I have put both windows XP and
Ububtu on it - its all working fine but I'd like to change the order of
the boot options in the initial startup screen. I installed WinXP first
and then auto installed Ubuntu and so the startup screen has Ubuntu as
the
Hi,
I have a couple of servo motors out of an old Olivetti printer which I'd
like to try to use, however, I can't find any information about the
encoders fitted to them. The encoders are in flat brown plastic
enclosures on the end of the motors and have 7 pin plugs with 6 wires
connected (the
It would be nice if someone would put up an image somewhere which could
just be written to a flash drive - it would save other people a lot of
trouble and would probably save us from having a lot of questions on the
list when people's compilations go wrong...
--
Best wishes,
Ian
Hi Dean,
If you go to Freepatentsonline.com and register there you can do a
search for 'spring loaded engraving toolholder' which will give you a
couple of pdf files of the patents for a tool like the one you linked to
with drawings etc - I believe you can make a copy of any patented
Hi,
I was trying to get my head round the concept of 'virtual machines' the
other day and failed to understand just how they work - do you have to
install the other operating system on the machine you are using the
virtual software on - ie. if you want to run a windoze program on a
linux
Mick,
Have you tried running the EMC2 cd as a Live cd - that is, don't install
it, just put the CD in the drive - it should start up and give you the
Ubuntu screen from which you should be able to run EMC2 from the file
menu. It will run much slower than normal but if it runs from here, it
Hi,
This is probably a silly question but is it possible to mix stepper and
servo drives on one machine? I'm a bit tight on funds just now but I
would really like to get a bit more speed out of my rotary axis so that
I can use it for screwcutting. I can screwcut on it now using its
present
Thanks to all who have replied - both on and off list. I'd better start
reading up - and being nice to the domestic chancellor!!
--
Best wishes,
Ian
Ian W. Wright
Sheffield UK
The difference between theory and practice is much smaller in theory than in
practice...
Thanks guys,
I had altered the [TRAJ] MAX_VELOCITY and DEFAULT_VELOCITY a bit, partly
because I read in one of the recent posts that it should be more than
the individual axis MAX_VELOCITY, however, I didn't think I had changed
it so much and it then got pared back until all the axes would run
Hi,
Has anyone considered the possibility of including load cells / strain
gauges into the control loop of EMC2? What I am considering is an idea
for making something which would require me to 'drill' a number of very
small holes in precise positions through synthetic sapphire sheet. I
could
HI,
What actually controls the jogging speed? - I'm sure I knew but my brain
is in Estop just now When I start up Axis, the jogging speed sliders
are at ridiculously high values and, if I forget to change them then the
axes give up half way through a move losing my position. G0 works fine
Hi,
Does anyone know whether it is possible to run EMC2 in Topolinux within
Windows XP? I'm not bothered about it running slow or not doing anything
'real' but my only computer with linux running on it is in the workshop
and it would be nice to be able to mess about with sims etc. on EMC
Hi,
If I hook up a touch probe as I hope to in a couple of days or so, does
it matter which parport pin I use? Is there a 'preferred'pin? Thanks.
Oh, and I'm thinking I ought to make some kind of 'amplifier' to make
the thing more accurate (reproducible) - any ideas on where I might find
a
I'm watching the table. I know the jog is working as if it were the tool
but my mind seems to want to think in terms of which way the table
moves. Also, the inconsistency between the XY axes and the Z axis often
confuses me (i.e. the arrow keys work reversed w.r.t. the table but the
page down
Can someone please give me a heads up on how to change the keyboard
shortcut assignments in Axis. At the moment I have to press the 'right'
button to jog the axis to the left etc. and I'd like to change 'em
around a bit. Thanks..
--
Best wishes,
Ian
Ian W. Wright
Sheffield UK
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