Messages

1

General Mach Discussion / Re: Using rg-59 TV cable for home and limit switch(s)

« on: October 14, 2011, 01:04:54 PM »

thanks for the info
geo

2

General Mach Discussion / Using rg-59 TV cable for home and limit switch(s)

« on: October 11, 2011, 03:32:21 PM »

Has anyone used TV cable for limit and home switch wiring.  It is totally shielded and a single conductor for series switch setup...the downside?

3

General Mach Discussion / Re: homed axis (XYZ) DRO does not read zero

« on: October 11, 2011, 03:28:02 PM »

I pulled the trigger too quick...I reread the manual and as you indicate, user error...set the auto zero and all is well
sorry to take valued support time..
thanks mucho
geo

4

General Mach Discussion / homed axis (XYZ) DRO does not read zero

« on: October 11, 2011, 02:13:00 PM »

Can't seem to get it right:

I referenced all and the machine completed as expected, however, the DRO are not showing zero.  I cannot figure out how to get them to read the home value.  I am trying reference the machine so the cutting area can be moved away from the home(s).  I am expecting the DRO to read zero on all axis.  Yes?
thanks
geo

5

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: October 04, 2011, 01:48:38 PM »

Rich:

Thanks for taking the time to explain (quite eloquently I might add) the concept.  I will forever be on guard for a snow storm.  I think my noise is coming from the power supply (inside the box) and would not benefit from interior shielding since the breakout board is is the same box.  I have been able to reduce noise to a minimum by using a separate power supply for the breakout board and another for the drivers.  I am now considering a limit and home board that has additional filters and pin buffering.  I am running debounce @ 50 and the system runs consistently with no noise reset.  My goal is to get it down to 0 with off the shelf components.  thanks again for all your help

geo

6

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: October 01, 2011, 03:57:03 PM »

it will reset @ 0.....still working on total total grounding and better shielding.  I can live with 50 (so far).
best to all
geo

7

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: September 30, 2011, 02:51:21 PM »

Go figure...I changed the pin on the limit and home switches and guess what....debounce @ 50 and NOT ONE RESET.  I think I'll declare victory.  Putting the original power supply back and see what happens....thanks to all.
geo

8

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: September 29, 2011, 03:49:52 PM »

The only way it runs without fault is to disable the limit and home pins.  I have attached a external power supply to the system and can make it run with the debounce set @3500....not so good.  I am in the process of adding ferrite cores to all cords, cables and driver feeds.  I am also building separate housings for the power supply, drivers and breakout board.  The micro switches are not expensive and not cheap.  I think my problems are related to other components, but if all else fails, I will invest in shielded switches. Any suggestions on the switches....I don't want to buy them twice...thanks
geo
 

9

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: September 29, 2011, 12:54:10 PM »

I have now grounded the power supply (with the ground from power source: a 2/12 w/ground power cable),  I  have run a chassis ground from each drive to the same ground as the power supply.  I have also grounded the machine frame to the same ground.  The breakout board is grounded with the power source (USB shielded cable with ground) of it's own.  Noise still rules....still resets.

I used a meter to check the continuity between all units in the system.  There was an unusual signal from the main power supply to ground:  the signal pulsed rather than continuous sound....must be the source of the noise.  None of the other components produced the pulsing sound.  Maybe a metal housing just for the power supply might help?

thoughts?
thanks
geo

10

General Mach Discussion / Re: series limit switch configuration using one for the home as well

« on: September 28, 2011, 01:58:21 PM »

Just a thought...I fabricated the control box of wood, thinking it might provide some resistance to noise...maybe the problem rather than a solution.  I grounded the cable to a ground terminal in the board...a little reduction but still resets every 3-4 minutes.  Currently, the only thing that is not grounded is the drives (he power supply is grounded with the input voltage cable).  Is there any sense in replacing the switches?

thanks
geo