Messages

941

Show"N"Tell ( Your Machines) / Re: Raskin Turret Punch

« on: March 25, 2014, 10:24:11 AM »

Good job Zafar! I expected that coming from you though.  You do good work.

Brett

942

Show"N"Tell ( What you have made with your CNC machine.) / Re: Cylinder Heads

« on: March 18, 2014, 10:47:03 PM »

Sweeeeeeeeeeeeeeeeeeeeeeeeeeeeeettttttttttttttttttttttttttttttttttttttttttttttt!

943

Show"N"Tell ( What you have made with your CNC machine.) / Re: Combined CNC Engraving Technologies. Spindle + Laser

« on: February 27, 2014, 11:09:59 AM »

Way to go Jeff! That's using the hat rack there. Pushing the envelop .0001 at the time. 

Brett

944

General Mach Discussion / Re: Shielding

« on: February 19, 2014, 04:24:09 PM »

Hello Bob, Welcome! You may find this topic helpful as well. It has links to some pretty good, short and fairly inclusive guides. Doing the research now is certainly the best time.

http://www.machsupport.com/forum/index.php/topic,25616.0.html

Brett

945

General Mach Discussion / Re: Limit rapid speed from a digital input

« on: February 18, 2014, 11:43:41 PM »

Who is on first. What is on second. I don't know is on third. 

946

Show"N"Tell ( What you have made with your CNC machine.) / Re: Bike I built

« on: February 17, 2014, 10:44:12 PM »

Looking forward to this one! 

Brett

947

SmoothStepper USB / Re: ESS Runs out of data when cold!

« on: February 12, 2014, 10:57:53 AM »

Icing on the cake Jeff, very good points. Of all the crazy laws we have one requiring that a CNC be kept in a climate controlled environment would kind of make sense in my mind. But if I had my rathers we would have no written laws so I'll hush now. 

Once had an operator complaining every time he goes to break and comes back his machine had jumped .002 and he had to dial it back in. Well, one his breaks were meant to be 15 minutes instead of 45 and two the big roll up door beside his machine was supposed to stay closed. Something about the 60 MPH arctic wind hitting his ways and control cabinet did things to his machine he just could not understand. 

Brett

948

SmoothStepper USB / Re: ESS Runs out of data when cold!

« on: February 12, 2014, 10:12:34 AM »

I imagine Jeff is spot on and your problem will be fixed with the newer plugin but I thought this would be a good place to mention a couple of things. Temperature and humidity can affect EMF or noise but the most common problem I have seen in equipment with temperature swings is in electrical connections. Often it is in solder joints but not exclusively. A cracked solder joint can be a real pain to find but a hair dryer and/or refrigerator can help a awful lot sometimes. Be sure and use some common sense if you try this method. The expansion and contraction the large temperature swing induces can verify a suspected trouble spot. The first thing you have to do is be able to recreate the problem anytime your trouble shooting. There is a big difference in trouble shooting and parts changing BTW. If you can count on the machine giving you grief on a cold day give it a try. First, narrow down all components that could produce the symptoms you see. Then, on a cold day fire up the machine and test to be sure it is acting up. If it is, take your hair dryer and try heating only certain components you have determined may be the trouble spot and test often. Once you find what you think it is take that component and put it in the fridge for a little while and once it is cold again reinstall and test. Make sure that you heat up anything else that you did earlier (before removing the component) before you reinstall the component. If everything is at the same temperature that had no problems except the one component you put in the fridge and now have the same problem (that the heating up removed) you have likely found the source. Try heating it with the hairdryer again as a test. If the problem is solved again with the heat you can feel pretty confident your on the right track. A jewelers loop may help you pinpoint it.

Brett

949

Show"N"Tell ( What you have made with your CNC machine.) / Re: An operating panel for MACH3

« on: February 08, 2014, 10:33:32 AM »

Good job Bo! You will be glad you did this as long as you have the machine I bet.

Brett

950

General Mach Discussion / Re: Shield grounded at one end only

« on: February 07, 2014, 05:55:46 PM »

Thanks again guys - meanwhile another (related) question: When we talk about noise - we're talking about induced voltages right? Any ideas on what levels we could be talking about? i.e. what sort of voltages can be induced into a screen?

If you know what the source of the noise is you may able to get a good idea here.

http://edn.com/electronics-blogs/bakers-best/4371301/EMI-problems-Part-three-strength-of-EMI-radiated-signals

Brett