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Author Topic: UC400ETH soft limit problem  (Read 292 times)

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Offline fast89

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UC400ETH soft limit problem
« on: April 22, 2019, 01:23:56 PM »
SO. i'm finally messing with an external motion controller. I've tried smoothstepper and didn't care for it. Now i have a uc400eth motion controller on the machine. The problem i have is software limits now cause the system to estop. Which of course de powers the servos and position is lost. Parallel ports never had this problem. Is this just the way it is? Because there really isn't alot of settings to be changed with the motion controller or am i missing something?

Offline ger21

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Re: UC400ETH soft limit problem
« Reply #1 on: April 22, 2019, 01:46:01 PM »
Send an email to CNC Drive describing the problem.
Gerry

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Re: UC400ETH soft limit problem
« Reply #2 on: April 22, 2019, 02:28:57 PM »
Hi,
you can turn soft limits off.

Have you homed (referenced) your machine, not just zeroed but referenced?. If your machine is  not referenced then
soft limits make no sense and are counter productive and need to be switched off.

Craig
My wife left with my best friend...
     and I miss him!

Offline fast89

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Re: UC400ETH soft limit problem
« Reply #3 on: April 22, 2019, 03:01:52 PM »
Machine always gets referenced but it is done outside of mach3 within the AC servo drives. I've used soft limits for more than a decade with parallel ports and it has always worked well.

Offline reuelt

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Re: UC400ETH soft limit problem
« Reply #4 on: April 22, 2019, 03:17:29 PM »
SO. i'm finally messing with an external motion controller. I've tried smoothstepper and didn't care for it. Now i have a uc400eth motion controller on the machine. The problem i have is software limits now cause the system to estop. Which of course de powers the servos and position is lost. Parallel ports never had this problem. Is this just the way it is? Because there really isn't alot of settings to be changed with the motion controller or am i missing something?
I think you may need to either PULL UP or PULL DOWN  all the unused input pins (with resisters) in the second port of the US400ETH.
"the gift of God is eternal life through Jesus Christ our Lord"

Offline fast89

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Re: UC400ETH soft limit problem
« Reply #5 on: April 22, 2019, 03:19:43 PM »
I don't think this is a port/pin issue or even a board issue. It is the way the UC400ETH handles software limits. So i guess i'm saying i think this is a plugin issue.

Offline fast89

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Re: UC400ETH soft limit problem
« Reply #6 on: April 22, 2019, 06:11:04 PM »
Had a chance to do some testing. I generally end my programs with :
G0 G53 Z0 M5
G49
G0 G53 X-14. Y-6.
M30

If i take out the G49, it will run the program just fine. With the G49 in there, it rapids to Z0, reads the G49 line, then moves to Z.01 and trips the soft limits and estops. The buffer is around 100% on the UC400eth i/o screen when this occurs. If i put a little dwell after the G49 line (300ms), then it will run the program just fine.

Offline ger21

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Re: UC400ETH soft limit problem
« Reply #7 on: April 22, 2019, 07:36:11 PM »
Again, you need to send this info to CNC Drive. If it's a bug in their plugin, they'll fix it.

Gerry

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JointCAM Dovetail and Box Joint software
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Offline reuelt

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Re: UC400ETH soft limit problem
« Reply #8 on: April 22, 2019, 10:28:30 PM »
I don't think this is a port/pin issue or even a board issue. It is the way the UC400ETH handles software limits. So i guess i'm saying i think this is a plugin issue.
1. If your port 2 of UC400ETH is unconnected you need to pull up or pull down all the input pins (see attached).
It is TTL logic NECESSITY.
2. If you think it is a plugin issue, connect your PC to the internet (may require an Ethernet switch) and the plugin should automatically update to newer version.
People on CNCZONE already had false triggering of limit switches with UC400ETH even in 2017. So if CNCDRIVE had fixed the problem, the updated plugin should be already there for automatic update by now in 2019.
3. Maybe heed the moto "Sell it buy a VW" and get rid of the UC400ETH and buy Pokey 57CNC instead.



« Last Edit: April 22, 2019, 10:30:01 PM by reuelt »
"the gift of God is eternal life through Jesus Christ our Lord"

Offline TPS

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Re: UC400ETH soft limit problem
« Reply #9 on: April 23, 2019, 02:28:05 AM »
I don't think this is a port/pin issue or even a board issue. It is the way the UC400ETH handles software limits. So i guess i'm saying i think this is a plugin issue.
1. If your port 2 of UC400ETH is unconnected you need to pull up or pull down all the input pins (see attached).
It is TTL logic NECESSITY.
2. If you think it is a plugin issue, connect your PC to the internet (may require an Ethernet switch) and the plugin should automatically update to newer version.
People on CNCZONE already had false triggering of limit switches with UC400ETH even in 2017. So if CNCDRIVE had fixed the problem, the updated plugin should be already there for automatic update by now in 2019.
3. Maybe heed the moto "Sell it buy a VW" and get rid of the UC400ETH and buy Pokey 57CNC instead.





he is talking about SOFT LIMITS, not LIMIT SWITCHES
anything is possible, just try it.
if you find some mistakes, in my bad bavarian english,they are yours.