Digest for sci.electronics.repair@googlegroups.com - 5 updates in 3 topics

N_Cook <diverse@tcp.co.uk>: Dec 23 04:40PM

It looks as though tightening torque would be very critical.
About 1/2 turn off opposing set screws changes the image about 70mm at
100m. Decided the way to do this is to measure one side only vertical
and horizontal , the side where the moving brass block is exposed beyond
the mount , so easily measured diametrically. First attempt went approx
same error the other side of zero. So adjusted to half the measurement
and then make final adjustemnt by varying the finger-tightness of torque
to the opposing set screw, before a dot of laquer.
.
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Dec 22 01:37PM -0500

On 12/22/18 3:08 AM, bitrex wrote:
> their just-encrypted device models to examine them I don't know, the act
> of simply de-crypting a file isn't decompiling anything and you're not
> modifying the model itself.
 
You can write a contract pretty well any way you like. It's pretty
tough to enforce a hardware EULA on something you bought at a tag sale
though. ;)
 
Cheers
 
Phil Hobbs
 
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
 
160 North State Road #203
Briarcliff Manor NY 10510
 
hobbs at electrooptical dot net
http://electrooptical.net
bitrex <user@example.net>: Dec 22 06:01PM -0500

On 12/22/2018 01:37 PM, Phil Hobbs wrote:
> though. ;)
 
> Cheers
 
> Phil Hobbs
 
At least for usage as opposed to dis-assembling the hardware the way
some consumer manufacturers deal with the problem of used sales is their
widget requires an Internet connection and user account to operate; it's
a brick unless it can connect to the Internet and self-validate that it
hasn't been mucked with and the secondhand user also signs off on all
the stuff that the original owner did.
 
Not uncommon nowatimes for software distributors to only allow software
to be downloaded to a machine that has an Internet connection using a
special installer, keyed to the hardware configuration of the machine
and run on that particular machine. If you want to install on a machine
with no Internet connection, or download on a machine with a faster
connection and transfer you're out of luck. If your hardware
configuration changes whether you're out of luck or not depends on if
the software-seller feels generous
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Dec 22 06:13PM -0500

On 12/22/18 6:01 PM, bitrex wrote:
> a brick unless it can connect to the Internet and self-validate that it
> hasn't been mucked with and the secondhand user also signs off on all
> the stuff that the original owner did.
 
Good luck doing that after decapping the flash and reading it out via
SEM. ;)
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
 
http://electrooptical.net
http://hobbs-eo.com
Jon Elson <elson@pico-systems.com>: Dec 22 03:26PM -0600

> a numbered variable. You could also display the counter value on the
> virtual control panel."
 
> I don't know what a do while loop is.
LinuxCNC has added a number of features to the basic G-Code language,
turning it into an actual programming language. So, you can write G-code
that is "parameterized", so you can set a few variables and then the G-code
loops and computes the actual coordinates based on those numbers given at
the start.
 
In your specific case, you would enclose YOUR entire G-code program within a
couple lines, like this:
#1 = 500 (do 500 parts)
O100 WHILE [#1 GT 0]
< your program goes here >
#1 = #1 - 1
O100 ENDWHILE
M02
 
See http://linuxcnc.org/docs/html/gcode/o-code.html#ocode:looping for more
info. But, the sceme here is you set user variable 1 to 500, then the WHILE
loop executes your program 500 times, and decrements variable 1 at the end
of each run of the program. When variable 1 decrements all the way to zero,
the machine stops. And, to get tricky, LinuxCNC has a virtual control panel
that can put indicators and buttons on the screen. I use it to show touch
probe status and spindle speed, but you can put nearly anything on there,
such as the value of that variable.
 
> programs will work the same without needing any changes. Having the
> count displayed on the main display is fine but it would be best if
> the original counter operated the way it does now.
That may involve adding a couple IO points to the hal configuration, but
could certainly be done.
 
Jon
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