Messages

2331

G-Code, CAD, and CAM discussions / Re: Blank wall re dxf files ??

« on: November 07, 2012, 07:17:51 PM »

The CamBam site has video's and tutorials.
RICH

2332

LazyCam (Beta) / Re: incremental I and J not working

« on: November 06, 2012, 05:57:15 AM »

Are you using Mach3 to control motion of the machine?
RICH

2333

General Mach Discussion / Re: software restraints.

« on: November 04, 2012, 05:02:20 AM »

MAGICMAN,
Have a look at this in Members Doc's.

http://www.machsupport.com/forum/index.php/topic,11409.msg72346.html#msg72346

RICH

2334

General Mach Discussion / Re: Copying the lock cutouts on an old shotgun.

« on: November 01, 2012, 05:05:03 PM »

How sensible is it to try and program a machine to cut out the lock end of a gun? and what kit do I need to do it?

It would be easy to do as compared to doing it by hand. There will be some hand work but minor.
If I were to do it i would just make a drawing of the pockets required and use a program to generate the code for the pockets.I say pockets because because there may be more than one.

There are a couple of options. You use CAD to create a dxf file, import it to a program such as LazyCam, Cambam,cut2d,
etc and generate the code for the machining  for use by Mach.

Another way would be to use Copycat which uses a webcam to trace the lines of the lock. and while doing that you assign the cut depth and Copycat generates the code on the fly.

There are other ways but the above give you some options to explore.

So you have some learning to do.

Have fun,

RICH

2335

Tangent Corner / THE DARK SIDE EACH YEAR

« on: October 31, 2012, 09:22:41 PM »

witches on brooms with cats and bats
all fly around with funny black hats
its good to have mother to tuck you in tight
and know that the witches have all gone on flight

Author: Granny
 
RICH

2336

Tangent Corner / Re: SANDY - ONE WITH AN ATTITUDE

« on: October 31, 2012, 12:08:28 PM »

Russ,
About 70 miles to some of the beaches  but rather close to the Delaware River. Fortunately never had any flooding problems in our neighborhood.
Yet just 1/2 mile away, in a lower lying neighborhood, they are under 5' of water.
Most of the heavy rain was about 20 miles south of us. We got  5 to 7" of rain.
RICH

2337

General Mach Discussion / Re: China 3020 Machine Losing Axis position

« on: October 31, 2012, 06:52:38 AM »

From your description seems the noise is picked up in the control box and the culprit is the spindle control board inside the control box. The spindle control is generating noise and that noise is coupled to everything else inside the control box.
Shielding the spindle control board and associated wire runs may help.
RICH

2338

General Mach Discussion / Re: stepper motor speed

« on: October 31, 2012, 06:17:21 AM »

would like to know about the relationship between velocity and acc? and step per unit and dir pulse settings?

Attached should shed some light on what your asking.
RICH

2339

Tangent Corner / SANDY - ONE WITH AN ATTITUDE

« on: October 30, 2012, 09:10:44 PM »

Sandy visited Delaware and went on her way to say hello to other states. Hopefully we not see the likes of her again.
She really showed an attitude not becoming of the typical stormy personality.
I must admit that local to my place we were very lucky and only lost power for 10 hours.
A lot of folks elsewhere were not so lucky though.
Hopefully your experience was only a matter of inconvenience also.

RICH




 

2340

General Mach Discussion / Re: Stepper Motor Cables - Shielded or Not?

« on: October 30, 2012, 11:08:22 AM »

I use shielded cable for the anything outside of the controller. ie; 4 conductor wire with a 100% shield from the controller
to the stepper and do what Hood mentioned.

I am no expert and will only say that most people just don't understand what the shielding is doing.
The shield keeps noise ( noise used loosely and in general ) inside from leaking out or keeps noise from leaking in.
Like water running in a pipe, the shield acts as a barrier to keep the water inside the pipe or takes what is happening outside
from going inside. The shield can be 100% or less, thus like a strainer water could flow through it, but the noodles don't go down the drain.......... if 100% then it's like a pipe but if more open it can restrict what can enter or exit and that depends on what the water is made up. If you have water inside the shield you need to get rid of or minimise the amount of water, wherever it is comming from, and the same goes for outside the shield. Sometimes the water is mixer with oil and you just have a mess on your hands and you are not going to separate the two.

How much water water exists inside or outside the pipe matters and depending on the rate of water flow you would do
things differently to get rid of it. If it only a drip and causes no problems you may be able to live with that condition but if it is a lot then eventualy it gets on whatever is inside or outside the pipe . So anything connected to the pipe sees the water and may cause a problem.

So much for the water analogy and maybe gives a very high level understanding to better understand shielding.

In most cases if one follows the general recomendations for using shielded wiring they will not have a problem.

Now for the experts before they get into the theory of dealing with the water ............
Just what do you do when the roof is new, installed properly , and water is driping into a room and can't find the leak?
Sometimes water / noise  problems are not simple and defies logic........

FWIW,
 RICH