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Wrapping up my mill rebuild and have run in to another issue.

Tried rigid tapping for the first time tonight and the spindle spun up to speed at the correct Z-height and just sat there spinning.  Obviously waiting for something that didnt happen.

First thought was  the spindle-at-speed signal.  Nope, that signal went high at the appropriate rpm, and stayed on despite a few rpm flutter.

Next culprit I suspect is the encoder index logic.  I know the encoder index signal/pin is working since spindle orient works OK.

Looking through my spindle HAL stuff, I remembered I had to use a tristate_bit pin to get orient functioning.  Because my spindle motor won't reliably orient on its own, I've had to add a pneumatic shot-pin to help stop it at the right spot.

Subroutine below, but basically I have to toggle the tristate_bit on & off, then rotate the spindle a rev or two to set the index.  Once that's set, shot pin is deployed and orient moves the spindle slow-ish until the shot pin drops in place.

Relevant HAL connections:


And the spindle orient/homing g-code:


Have I somehow hijacked LCNC's ability to set index-enable for G33 commands?

Do I need an or2 component somewhere so that something in LCNC can set the index-enable pin high for synchronized spindle moves in addition to the orient sequence?

Or should I be looking elsewhere for the tapping-won't-start problem?

Exzellent! Ich freue mich, dass es bei Ihnen funktioniert.

Chris

Adding my two cents here...

I get a similar error message when trying to load a g-code file in PB.  No issues with the backplot but the attached error message pops up when I load the file.

I think I narrowed it down to the tool number being >199.

When I commented out the T407, T823, and T642 it loaded with no complaints.  And when I edited the file it would load fine at T199 (other two commented out) but puked when changed to T200.

I can load the tools in/out of my ATC using the PB interface, and call them up via MDI with no errors.

I can work around this for a short time by renumbering tools, but this is going to be annoying since I imported my F360 library to LCNC and I've got tools up to the 1100-range in the table.

You can try to make a preview window with QtVismach. In Vismach the rotation axis displays well. I quickly made a window that is overlaid on qtdragon , as in the screenshot. You would have to work on displaying the gcode preview, but it would probably be useful.

woo

I'll be hosting a heavily optimized AMD64 Gentoo build for LinuxCNC and I'll be updating my interactive Gentoo installer too, it'll have the 6.12 PREEMPT_RT kernel, XFCE 4.20 pre-release and LXQt 2.1.

Installer works very well, removes all the hassle from building sources, works with LinuxCNC out of the box (just have to emerge it) and the installer works faster than Ubuntu and Debian installers. It's just out-of-date at the moment.

edit: Currently having serious issues with lxqt-panel (the fricken task bar) so it may just have XFCE instead.

edit2: Problems solved, LXQt will be available in this build too.

its fixed now, it was some small potentiometer on the drive that was set to set wrong position and after that it runs super smooth

Hi all, 


I apologize for the delay. I have been busy with this and another project. 

So the new rackrobo does have a way of modulating power output.  I was able to get my hands on a power supply at no cost to me. They are having some issues but it seems like the probability of an issue occurring is still pretty small.  If I do have issues I'll look at swapping the power supply. 

Yes I imagine sinker would draw a lot more power then wire and especially hole drilling. 


As far as linuxCNC control of EDM. Does anyone know if the ones like tommy was showing are using reverse feed rate and short detection?  It seems like it wouldn't be too difficult to pause the program when a short is detected, but does anyone know if it is possible to get reverse feed to pull out of the short and then reengage? I know this is how professional machines operate and I would think someone has figured out how to do this with LinuxCNC...  Any LinuxCNC wizards out there know how to do this?


Best,
-Dylan

Hi,

Years ago i had the same problem as you. Was cutting a Thermal Dynamics 200 Amps + compressor + cnc.
I managed to get a diesel power pack on a trailer.

So if you are like a professor you could manage to create a big iron flywheel in your workshop.
Driven direct drive by a electromotor.

Say the flywheel mass is about 2000kg, rotating at 500 rpm. This will solve power dips for the whole street.
It's a silent & cheap solution.







 

Hi,

So far i am happy with the insights tonight.

Source code:
rtapi_function_loader

Above is a repository testing the posix pthread, running different .so libary functions named "test();".
It's more or less how the original rtapi workflow is.

This is tested ok with a base thread nano second : 25.000
And you can set the used cpu's. You can set it by  passing a cpu_list = {0, 1};

If you load 4 instances of the rtapi_function_loader class and assign each
instance to a different CPU (CPU 1, CPU 2, etc.),
each instance will run on its own dedicated CPU core,
ensuring that all 4 threads run in parallel without sharing CPU time.

We have also a priority for the rtapi_function_loader's pthread in the value 0 up to 100.

Ok, now next thing is maybe to look when, where and why we need to allocate shared memory blocks.

wiring for the sanyo drives. i forget now if the toshiba are different.  you really do need it all connected including voltage references, start(enable), etc.
 

alexbrem89 wrote:

Does anyone happen to know how I can connect the spindle orientation?
I have the spindle turning, but not yet the orientation
 

I never got that far with mine. I dont think its covered in this thread, but i think some others did it elsewhere. I think most people switch the spindle to A axis, and then home. 

These are ac servos. noise should not be of any issue as it a differential analogue signal.

I think its just connected wrong.

Does anyone happen to know how I can connect the spindle orientation?
I have the spindle turning, but not yet the orientation

Philip wrote:

i tried with a battery and and variable psu but it makes alot of noise and shuts off because of overheating after maybe a minute of running, i guess the drive is overheating since i dont got the tempreature sensor connected.

Noise and vibrations are from interference with unshielde/ungrounded wires, but since it is an old machine, check if motors have brushes and if they do, yank them out and use compressed air inside the brush orifice to remove the fine dust that gathers there and can cause heating during normal work.
Do keep track at what brush was in what orifice and how it was oriented, that is very important.