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Benb wrote:

Tommy what you saying in your rant is wrong “software estop is not allowed “.

It is allowed, depends on machine, most hobby machines do not need it as the spindle is not controlled by LinuxCNC, etc etc etc
And my rant was about the "e-stop latch", not the "e-stop".

Benb wrote:

 So, do yourself a favor and add an external estop to your 50 kg bench drill press and your 16-ton machine.I also hope you don’t let anyone else uses your software estop equipped machines, they are unsafe and you will not forgive yourself if someone else using them gets hurt.

You missed the point, they do have E-stops, big ones at least two, and the proper safety stuff, always.
My small plasma machines do not have any, they do not need it, ever. My Big industrial plasma machines with DC servo motors have at least 2 e-stops and obligatory "extreme limits" on all axis
Never had a single incident on my machines, the biggest incident was braking an end mill.

Benb wrote:

And yes, no one asked me for advice but since Linuxcnc documentation does not address this subject I felt obligated to make hobbits and new Linuxcnc users aware of the use of Estop.

I already said thank you.

Benb wrote:

Tommy as Linuxcnc gate keeper do us (Linuxcnc users) favor and add a warning in the Linuxcnc documentation “software estop is not allowed.  here is no substitute for an external standalone Estop/reset”.

Again, as Aciera said above,

--dbname3 7i85 is that an internal or external file.

I've just spent a lovely morning adding a new name to mesaflash, all faults my own. Stuffed the name up in my bit file, and then forgot a few things when adding it to mesaflash itself.

A little off topic, is there any recommended convention for naming a board. I've gone with "7x57"
7 cos that seems to be a trend (or would something else be better to distinguish it as a clone), X cos it's "off brand\clone" and 57 cos it has 57 pins. I'd like to eventually make a request at github for the changes I've made to mesaflash & linuxcnc, just to make my own life a little easier when updating and if anyone wants to give setup a go.

Hi Phil,

I increased the MAX_ACCELERATION values but no difference, same behaviour.

Cheers, Peter

Thank you, that was indeed the problem.

That it has a default 5-second timeout (as opposed to no timeout), I would argue, is a mistake.

My routine runs the dust collector shoe over the table to vacuum up debris, hence the need to be able to run for a couple of minutes.

Gatekeeper ?
Full of good solid advice would be the better description.

Man you are so out of line with that comment.
Up til then it's been a decent discussion.

I'm just hoping there was a bit of confusion into the term "e-stop latch".

Just a little aside.
I've worked a lot of casual labour hire, disposable workers is what we really are, I was at a recycling plant, pulling steel that was missed during separation and wasn't supposed to go into the crusher. The plant wasn't the best safety wise. Anyways they had this dodgy estop setup, was like 2 step away from where you had to work. So after being there for a bit I realised the issue, spoke to the guy on site, no reaction, spoke to my contact at the labour hire mob, all they hid was ring the plant up and were assured yes there is an estop on the machine, tho access wasn't never discussed. So I said "Fuck it" and walked out. Got a call from from the labour hire mob, told them never to call again as their "safety officer was useless". Yeah and they are a major player in concrete recycling in Sydney.
So yeah machine safety is fucking important.
I fully agree a software estop is not the ideal way to go. Ah fuck I've lost my train of thought.

Just to add to the previous : when I use conversational to generate the same contour the sudden feedrate change at the last straight line doesn't occur. But when I add "#<holes> = 3" to the conversational program the velocity is simply 60% of the feedrate all around the contour. Got me stumped.

The file seems to run fine on a sim.
My first thought was that it may have been due to the seemingly slow MAX_ACCELERATION values in your ini file so I changed the values in the sim to reflect yours and it still seems to work fine.
 

Hi all,

We are seeing some unexpected behaviour on our plasma cutter. I have attached the config settings file and a G-code program which behaves strangely. (We do see similar behaviour with other programs as well, but it a bit unpredictable.)

Let me try to explain what happens : When the first 2 slots are cut the torch moves to the first outside contour. During cutting that contour the velocity doesn't exceed 1700mm/min, which is 60% of the material feedrate (2815mm/min). But when it rounds the 4th (last corner) and enters the straight line all the sudden the velocity is at 100%, 2815mm/min. It does this on all 4 outside contours.

My best guess is that it has something to do with the M67 commands which QtPlasmaC adds, but why it is not consistent is beyond my expertise or comprehension. Anybody with thoughts ?

Cheers, Peter

 

Tommy what you saying in your rant is wrong “software estop is not allowed “.   So, do yourself a favor and add an external estop to your 50 kg bench drill press and your 16-ton machine.I also hope you don’t let anyone else uses your software estop equipped machines, they are unsafe and you will not forgive yourself if someone else using them gets hurt.

And yes, no one asked me for advice but since Linuxcnc documentation does not address this subject I felt obligated to make hobbits and new Linuxcnc users aware of the use of Estop.

Tommy as Linuxcnc gate keeper do us (Linuxcnc users) favor and add a warning in the Linuxcnc documentation “software estop is not allowed.  here is no substitute for an external standalone Estop/reset”.

Moutomation wrote:

Hello,
I use gmoccapy. When I turn on the machine, the computer starts first, then gmoccapy. How can I shut down Linuxcnc first and then the computer when I press an external key?
Can I do this with a button on the machine?
 

Hello,

I think you could script the HAL file to configure the external button to shut down LinuxCNC first, then the computer, and link the button to both functions in that order.

 

Thanks for they reply. I bought this controller on ebay(picture). it was cheap, not totally sure it will work, but it was $25. I think right now the biggest problem is going to be figuring out the wiring on the motor, because it's not labeled or anything. I'll look into those controllers as well.

Also do you think 60v sounds right ? that seem high to me. 

Not really good enough. Everything needs dual redundancy.
 
Note that the estop button has two redunant circuits
The main contactor needs both K1 & K2 to be triggered
K3 & K4 are seperate force guided relays. Linuxcnc is not updated with a sucessful power on unless both K3 & K4 are triggered.
Force guided relays have a non conductive pin forced between the contacts to ensure contacts cannot be welded together.
Additional safety switches eg. door switches, guards etc are placed in the S33/S34 loop with the reset button.

With such a wiring layout, it is permissable to use  linuxcnc's software power button as a reset latch. In this case, use iocontrol.0.user-request-enable as it receives a pulse to repliciate the external reset button.

BUt the safety relay cost me $250 AUD and another $100 or so for the force guided relays.
 

F117 has 9 computers with a single purpose of keeping it from falling like a brick!
Yes, it is a plane, and it is stealth.
No one asked for this info.....
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Benb is trying to explain, with examples, how e-stop functions and how it should be implemented and why it is very important, so help him.
Thank you Benb.
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Mentioning related stuff and the multitude of options might add to it, but it is not helping much without actual examples and corresponding info.
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Another rant:
I have never used e-stop latch, although it does have it's uses for sure, but i have used the normal e-stop in and out even on 16 ton machines, as Aciera so eloquently put it "the implementation of proper machine safety standards is first and foremost the responsibility of the machine integrator" so the e-stop from LinuxCNC is just integrated into the machine e-stop system.
My point being, stop telling people to use e-stop latch unless they actually need it, they wind up wasting days trying to set it up and get frustrated, while the machines using it can be mostly stopped with a single hand and not much effort.

Let me be clear ,I am only trying to raise awareness that screen estops are not allowed.

This discussion is not about machine safety relays, devices, … etc. So, let’s not mix-up things and muddy the discussion.

This awareness message is strictly about machine estop/reset only, which require very simple relay circuit. If you cannot read electrical diagrams just google start/stop circuit and you will find several examples showing realistic picture and wiring diagram for non electrical inclined. 

To build an estop/reset circuit you need: red mushroom shaped push button, a push button and a relay wired as follows:
 

 Hi .
I recently purchased HCFA HN-Y7FB040A-S servos. Linuxcnc installation with Ethercat went well, but I don't know what to do next. How to configure it all. I've been working on it for a long time and nothing comes to mind. I'm mainly interested in the .xml file, how to go about it.

I received a configuration file from the manufacturer, but what to do with it next?
I'm new to ethercat. If I don't have a problem configuring mesa or lpt cards, I don't know how to deal with ethercat.
I have a project to complete to build my own machine and I would like to use these servos in it.
Please help. I'll be happy to return the favor.