pncconf Clearpath SDSK settings

fully_defined wrote:

Okay. I am looking for known good values for Clearpath SDSK servos on an Avid router, specifically a Benchtop Pro. There is no way that I am the first person to set up this specific configuration.

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Its rare to find people with identical setups. Start at about 750-1500 and see how you go once you are moving. The mass you have to move will affect the maximum value. Assume for now 3000 will be absolute maximum. Remember its a trapezoidal accelleration profile which means the deceleration is also affected by this setting. I have had to reduce accelleration to prevent the motor decelleration being overrun by the inertia of a moving mass which caused following errors.

Its better to get reliable motion instead of shooting for the stars immediately and failing.

Through luck and a Google search, I have found: www.forum.linuxcnc.org/38-general-linuxc...learpath-sdsk#112579

It doesn't mention HLFB in the title at all, which is why it took me this long to find it, but it looks like there is a clue about how to start the process of integrating it. Unfortunately, it's an editing of HAL step, and I still don't know where to start in pncconf. How do I assign these pins in pncconf?

What I would do is get a basic working configuration with pncconf.
This means setting the machine limits, scaling, directions, timings,
velocities, and accelerations. Once this is working I would then worry
about tuning for best performance and  special features like drive fault
operation.

That is, don't get the sandpaper out when you are still in the chainsaw stage.

 

Aciera wrote:

@fully_defined
Deleted the twin thread. Having multiple threads about the same topic will invariably cause confusion.
If you want to make the results of the discussion more visible you can edit the first post.

Thanks
 

I wish you hadn't. Some thoughts:

1) You would save yourself a lot of time and energy by creating a default configuration that works for a common machine type, like a router, and then explaining what special considerations should be made to account for unique machine types, rather than the blank canvas it is now.
2) Update the documentation! It's basically useless for unseasoned users, in its current state.
3) You should strongly discourage your half-dozen most prolific forum posters from only partially answering questions, which is more confusing and time-consuming for the person asking the question(s).

I have extremely common, made in USA axis motors and a brand new Mesa Board. This should be a slam dunk, five-minute exercise, plugging in a few values and following explicit instructions, but instead I am several threads deep and I know less now than when I started. Tormach mills have Mesa boards, and run PathPilot, which is just LinuxCNC, so what I'm doing should have already been well-documented.

I made the second thread as a place to store the correct answer in its own little place on the forum, for future reference. Otherwise, I, and whomever else might need the information, would have to wade through several hundred entries of me arguing with people for weeks to get a simple answers to simple questions.

PCW wrote:

What I would do is get a basic working configuration with pncconf.
This means setting the machine limits, scaling, directions, timings,
velocities, and accelerations. Once this is working I would then worry
about tuning for best performance and  special features like drive fault
operation.

That is, don't get the sandpaper out when you are still in the chainsaw stage.
 

I don't know how to respond to this, other than to say that's exactly what I'm doing.

My advice to you is to improve your documentation, because that is the real issue here. I'm trying not to bother you on the phone or email you directly, but I need to know how this software works, in order to use it. It just isn't set up for a newbie to walk in and paint by numbers, and it should be, for a simple 3-axis benchtop router with Clearpath servos. This should not be a science project.

I have made parts that have been in Space. If you're looking for a test-case for someone willing to follow directions, I'm your guy. I just need the directions!

Instead of complaining about the docs, why don't you take the time to read thorugh them systematically? Thats what I did to get started.
I never look at an alternate source of information. It just confuses. Forget about AI and google. Thi s is such an old project with many versions of the docs, chances are it will return an obsolete page
.
There are probably thousands of pages of docs, when I started here, I thought it was one of the best documented project I had come across.
 

Aciera wrote:

Oh, it's you again. You do certainly have a talent of making people NOT want to help you.
forum.linuxcnc.org/38-general-linuxcnc-q...89-which-ui?start=30
 

"Help" is a strong word for what's happening here.