Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: hdfatboy on December 22, 2018, 07:24:09 PM

Title: loss of Estop and limt swich signals
Post by: hdfatboy on December 22, 2018, 07:24:09 PM

has anyone ever just lost the limit switch and e stop signals, i have replaced the motion control board with the same results. need advice

Title: Re: loss of Estop and limt swich signals
Post by: joeaverage on December 22, 2018, 08:39:30 PM

Hi,
what model/type/flavor is your motion control board?

Craig

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on December 22, 2018, 08:52:53 PM

it is the mach3 RNR motion control. I bought one exactly like it and none of the inputs are working. estop,limit,home. no response to the ground.
when i first got the machine and installed limit switches all worked great for about 7 or 8 months, then all of a sudden one day i went to home it
 just hit the hard stop and the e stop stopped working. 

Title: Re: loss of Estop and limt swich signals
Post by: joeaverage on December 22, 2018, 09:09:53 PM

Hi,
my opinion of those boards is scathing at best....I wish you luck.

A few days ago I made a similar comment to another user......and he has proven me wrong and managed to get his RnR board to work.

http://forum.machsupport.com/forum/index.php/topic,38954.0.html (http://forum.machsupport.com/forum/index.php/topic,38954.0.html)

Maybe a PM to comet might produce enough information to get it to work.

Failing that buy yourself a US or European made board, they may be much more expensive but they work....and will carry on working for years.

Craig

Title: Re: loss of Estop and limt swich signals
Post by: Flowerpot on December 23, 2018, 12:08:34 AM

Same thing with 2 different cards? Has the external power supply for the inputs died or become disconnected? (I think it's the 24v and dcm connections, not sure though)

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on December 23, 2018, 10:29:15 AM

Don,t understand why a new board wouldn't work, I have checked the power,24v and 5v, all is good. can you suggest a better affordable motion control board.

Title: Re: loss of Estop and limt swich signals
Post by: ger21 on December 23, 2018, 10:48:39 AM

Anything not made in China. My preference would be the UC300ETH or UC400ETH.

But I doubt that you have two bad boards, unless a wiring issue killed them both.
Have you changed Mach3 versions, or any other settings?

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on December 23, 2018, 07:47:06 PM

I could understand a bad wiring connection, but the fact is i stopped on its on and i was very careful to connect it correctly. so you guys are saying this could not be anywhere else but the motion controller board. if this is true i will get a different board.

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on December 23, 2018, 07:55:07 PM

I would prefer a usb connection over the ethernet

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on December 23, 2018, 07:57:12 PM

I do thank you guys for your help,so hopefully with your help i will get it corrected .

Title: Re: loss of Estop and limt swich signals
Post by: joeaverage on December 23, 2018, 10:39:50 PM

Hi,
the general consensus is that an Ethernet connected board has lower latency and better electrical noise immunity.
If I'm not mistaken all the reputable manufacturers current models are Ethernet connected.

Gerry favours CNCDrive products like the UC300 and UC400. I favour the Ethernet SmoothStepper by Warp9. Other users favour
the Ethernet connected 57CNC by PoKeys. All of these products are good, they are all around the same price, give or take $50 and all three
companies support their devices. You'd be happy with any of them and I would anticipate you'll get many years of use from any of them
provided you don't do anything silly to blow them up.

Let us know how you get on. I know it may seem like an expensive step but my experience is that buying a good external motion controller
was one of the best CNC investments I've ever made.

Craig

Title: loss of Estop and limt swich signals
Post by: hdfatboy on January 19, 2019, 09:19:44 PM

i still have not found a cause of my loss of signals, i have two BOB's and they both do the same thing. does anyone know if there would be some other reason for this to happen , like something in my pc. i have tried almost everything that i know. my 24v and 5v is there where they should be , have tried active low and active high with no change. none of the input signals respond, everything else on the BOB works.

Title: Re: loss of Estop and limt swich signals
Post by: hdfatboy on January 20, 2019, 11:00:47 AM

Thanks, I will get one of the ones you mentioned when i can fit it in my budget.