Actually it's easy. You use a hot air re-work station. Basically a hair
drier with a 1/8th inch diameter nozzle.
Hold the little part in place with a wood tooth pick and aim the hot air
generally at the part. The solder on the part and the PCB melt, release
the toothpick and surface tension the
#1. What method could be used for a tool change recovery sequence?
#2. Door switch safety?
#3. For a brushless servo system without halls, how to get phases in
sync with encoder.
--
Check out the vibrant tech communit
On Saturday 15 October 2016 02:38:59 Chris Albertson wrote:
> A source for 0.1 bypass caps? I buy most everything fro eBay now.
> But you don't want a film cap, you want a "Multilayer Monolithic
> Ceramic Capacitor". I just happen to have one here on my desk and a
> copper US penny too. I plac
On Saturday 15 October 2016 02:55:39 Chris Albertson wrote:
> Actually it's easy. You use a hot air re-work station. Basically a
> hair drier with a 1/8th inch diameter nozzle.
> Hold the little part in place with a wood tooth pick and aim the hot
> air generally at the part. The solder on the
Ah, I was about to say "no, it's just 100x the accel, not 100x^2 the
accel, we're just changing the time frame".
But I started to question myself and did the math logically. Duh. YOU
are right, I've had that all wrong.
That 25% gap seems troublesome. Because, like I say, I need to use it
to
On 15 October 2016 at 14:54, Erik Friesen wrote:
> #1. What method could be used for a tool change recovery sequence?
That rather depends on what it takes to recover the situation, but
there is scope for reporting tool-changer errors through HAL and a
"magic comment"
If you control the tool chan
I wonder of the stand-alone interpreter is a better place to start a
time-estimator?
http://linuxcnc.org/docs/2.7/html/code/rs274.html
It would need tweaking to calculate acceleration, velocity and time,
and it would still be inaccurate unless it grew to replicate all of
the arc blending code.
I
I stripped the config bare, except for motion, and the timer component. had the
command connected to the feedback, to try to get as little cpu overhead as
possible. I tried setting the thread speed to 1, and it didn't make a
difference. But by jacking up the acceleration, I think I was able
On 10/14/2016 12:09 PM, Erik Friesen wrote:
> I guess I am not following how a hardware interrupt gets mapped to the
> userspace/lcnc servo thread. Any pointers on this?
>
>
Supposedly, this is fairly easy to do on the rt-preempt
kernel. It seems it was harder to do this through RTAI.
Michael Ha
On 10/14/2016 07:19 PM, Joshua Glenn wrote:
> Hello all. I am wondering if the universal stepper controller from Pico
> Systems requires an external 5V power supply or not. And, if so, what is
> the current requirement and to what terminals should I connect it?
>
It requires an unregulated source,
On 10/14/2016 09:50 PM, Chris Albertson wrote:
> No, it would not get you to ns levels.
>
>
>I've
>> wanted to set this up on X86 through the parallel port for
>> some time (since about 2002, in fact) but it would take some
>> serious hacking on the PPMC driver. It looks like it might
>> be ea
Injection pressure will be trying to force the two sides of your mold apart.
That's why injection molds are made of tool steel, and injection machines have
VERY sturdy construction to hold the mold closed. I saw a machine that might
be big enough to make your parts - the mold closing cylinder wa
2016-10-15 22:33 GMT-03:00 John Kasunich :
> Injection pressure will be trying to force the two sides of your mold
> apart.
> That's why injection molds are made of tool steel, and injection machines
> have VERY sturdy construction to hold the mold closed. I saw a machine
> that might be big enou
Greetings all;
I just spent about 3 hours playing around with the 20 or so belt
calculators google gave me links to, but not on of them could give me
any answers.
One would think, for an XL belt that
1. width is a never mind since xl's are available in a plethora of
widths, none of which shou
Gene,
On 10/15/2016 08:53 PM, Gene Heskett wrote:
> Greetings all;
>
> I just spent about 3 hours playing around with the 20 or so belt
> calculators google gave me links to, but not on of them could give me
> any answers.
>
> One would think, for an XL belt that
>
> 1. width is a never mind since
Trajectory planners used with all LinuxCNC releases have
employed trapezoidal velocity profiles (e.g. fixed accels,
no jerk limiting). With trapezoidal planning used for both
rapids and feed moves the only individual segment motion
types are:
1) velocity ramp segment:
v = a * t
x = 0.
I am wanting to cut down a 1000lb rated gantry crane to a size that will
fit my Shop. This crane is made from 2" rectangular tubing. I will do
the initial cutting with a Harbor Freight band saw, but I can't count on
it giving true 90 degree cuts. My thoughts are to true the cut surface
with
On 15.10.16 22:44, Leonardo Marsaglia wrote:
> Yes the idea is to machine the four strips and then joing them strongly. To
> clamp the mold I was thinking about mechanical ways like eccentrics or may
> be screw clamps. That way I can hold the mold together when the injection
> takes place. I really
On Saturday 15 October 2016 22:29:50 MC Cason wrote:
> Gene,
>
> On 10/15/2016 08:53 PM, Gene Heskett wrote:
> > Greetings all;
> >
> > I just spent about 3 hours playing around with the 20 or so belt
> > calculators google gave me links to, but not on of them could give
> > me any answers.
> >
>
Look up how PVC house window frames are made. They use extrusions, cut the
corners at 45 degrees then melt them together.
Here's a video on a portable corner welding machine.
https://www.youtube.com/watch?v=cni6XdgOTj0
From: John Kasunich
To: emc-users@lists.sourceforge.net
Sent: S
When I worked for a semi conductor tool manufacture we used to
plastic weld the drip trays out of PVC and Chemistry tanks out of other
plastics for HF, H2SO4 and other nastiness.
The process is very similar to Tig welding metal. We used a hot air
gun and a filler rod to fuse and fill the
Some weld metal is very hard. Try a hand file on a weld bead to see how easy it
cuts. If you can't shave off a decent amount with moderate hand pressure you'll
have a heck of a time milling the weld.
How thick is the tubing wall? One solution could be to cut the end off, leaving
a short stub, ab
22 matches
Mail list logo