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For GMOCCAPY 3 some HAL pin names have changed when new controls have been implemented. Max velocity does not exist any more, it was replaced by rapid override due to the demand of many users.

For the record, don't repeat the mistake I made a while back. I mounted the encoder inside the belt drive housing to some shaft driven by gearbelt. If I remember right I used a hal mux switch to select encoder scale according to backgear position. It all worked pretty good, but foiled all attempts at tapping because the encoder was not at a 1:1 ratio to the spindle. I think the big problem was index changed with each spindle revolution.

I figure it would have worked better to drive the encoder at a 1:1 ratio with the actual spindle.

I explain above that with every settings off the difference is about 5000-7000
Edit: Anyone know how to use gpio on the board?

Edit 2: i really hate this style off editing of the forum. 

I used last night the iso from youre post
www.forum.linuxcnc.org/9-installing-linu...-rtai-and-rt?start=0

Linux Mint 19.2 with the bios settings off (single core) RTai
Run it like 2 hours and it never froze.
And the latency was about 12000

I do like your thinking!
I have been toying with putting an encoder on the spindle. (I have some spindle encoders that was salvaged off Mori-Seiki lathes in a box somewhere) Using the index marker on those should give an accurate rev counter for the MESA and HAL implementation. I would also have a solid encoder for the spindle, should I want to venture into rigid tapping...:thinking

Considering the Atom N450 is a single core CPU I'm unsure how isolating a core that doesn't exist would work.
You may get better latency if you disable Hyperthreading.
I'm assuming you are going to use the parallel port.

Thanking you kindly sir.

unknown wrote:

Does this mean I should remove the link to the RPi5/4 images I've been working on. Which I have no issue with if this is the way it should be.

Cheers
Rob

If you mean the GitHub link, no, you don’t need to remove it. It’s not a mirror. It’s your own work and it’s been communicated as such.

That is not the image I'm referring to. That image has been uploaded via one of the mods.
I don't not have access to any of the Linuxcnc resources. Even if I did I would ensure that the image was vetted and approved by others.

tommylight wrote:

Not near a machine so i can not confirm this, but IIRC:
Yes it does Disable the machine.
No, it does not trigger e-stop.

Near as I can tell, this is correct. It disables the the machine, requiring it to be re-enabled, but it does not turn the machine state to "OFF". This is why you see the GUI turn "OFF", and halui.machine.is-on turns False. But that's not the same as toggling halui.machine.off. I don't think this is a bug, I think this is a misunderstanding of what happens when a amp-fault is triggered. If you want this to work, I think the best course of action would be to connect the pin to machine.off as suggested previously.

github.com/LinuxCNC/linuxcnc/blob/69d26e...otion/control.c#L838

Does this mean I should remove the link to the RPi5/4 images I've been working on. Which I have no issue with if this is the way it should be.

Cheers
Rob

Posts with links to non-sanctioned mirrors of forum content, ISO downloads, and/or other LinuxCNC content are not permitted and will be removed.

Posting such links may result in moderator action which includes being banned from the forum.

Thank you for your cooperation.

7C81 configuration for 7I78 on P1, INM on first 12 P2 pins

The inm module supports up to 4 MPG encoders,
it also has built in input filtering/debouncing.

The last 5 P2 pins are left as GPIO so can be inputs/outputs
as needed


 

 

What exactly do you mean by: Adding second spindle control to pyvcp?

It seems very strange to me because it works perfectly fine for me on several machines where I've installed potentiometers to control those two speeds. I honestly don't know the resolution of the ADCs on the card you're using. In my case, the control is very linear between 0%, 100%, and 200%, which is the range in which I have those two overrider speeds programmed. Could you please repost your configuration so I can try to help you?