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Look under /boot there should be a folder called broadcom, or something and config.txt will be there.
The image is not a Raspbian OS based one but based on plain Debian but with a suitable kernel.

How did you enable SPI? I didn't find it in "sudo menu-confg" and "sudo raspi-config" command not found.

It is a Print NC 3 axis router.

Yes all in stock (7I84,7I84U, 7I74)
 

Hello
 I am trying to compile the code with an esp32 but I have an error message?

 

JT wrote:

I actually forgot that logging in as root didn't put me in the actual root directory.
...
So I can find the joomla and kunena  directories
...

That sounds like a good basis to get an overview and check what is feasible, offers of support have come: forum.linuxcnc.org/36-using-this-forum-q...ourse?start=0#263279


@JT: You wrote in another post that you don't want to destroy the forum itself, which I think is a good idea .

Would it perhaps be possible to run a second forum in parallel (for a short time) and then try to copy the current forum into it (posts, images, ...) and then, if it works, switch over?

Unfortunately I'm not familiar with this either But personally I would welcome it if the state of the art would work again.

VG Mücke

Translated with DeepL.com (free version)

Thanks Peter,

You have these in stock?

A 7I74 and 7I84U would be a bit more flexible.
 
The 7I84U has these advantages over the 7I84:

Each output can be sinking, sourcing, or push-pull

No flyback diodes needed on outputs up to full (500 mA) current

Are 7i74 and 7i84 boards available now? I have to add a topolchanger to a big system I did years back and I need to add a I/O board to a 5i25 on the second port.

Was thinking a 7i74 and a 7i84. Any thoughts or a better idea?

Thanks,

Bob

7I96S    CL57
+5V     PUL+
STEP-   PUL-
+5V     DIR+
DIR-     DIR-

SW3 Set for 5V mode

The ENA, ALM and BRK can be left unconnected

NC means no connection, so don't connect the ENA pins.

Also make sure that the CL57 is set for 5V inputs

PCW wrote:

For a DM542, I would wire:

DRIVE      7I96S

STEP+      +5V
DIR+        +5V
STEP-        STEP-
DIR-          DIR-
ENA+       NC
ENA-        NC



 

Hi PWC,

What is NC, please? I have looked through the layout, there is a NC mark in TB2 ANALOG:



This is for my own understanding, I am not using this driver. My driver is CL57T which also has Enable pin.

Thank you. 

 

Dear All,
I have an old milling machine with a hydraulic spindle speed range switch. The hydraulic valve has 2 coils (low and high speed). There are 2 feedback inductive sensors (for low and high speed).
How can I solve this so that when a program needs to change the speed range, it does so automatically under the following conditions.
- the spindle can only rotate (in the between min-max range (50-3200rpm) if the inductive feedback corresponding to the speed
- the range can be changed by reducing the speed to 1-2 rpm
- low range (50-1500rpm)
- high range (1501-3200rpm)

I am looking for advice on how I can solve this properly. (I have never done this with Linuxcnc before)

Jdolecki wrote:

How  does the servo driver know I want to switch from turning to position for milling?
 

As @Aciera pointed out, there are (at least) two methods for combining a velocity-mode spindle with a position-mode C-axis.

In Aciera's first example (caxis.comp) the servo driver doesn't 'know' anything about turning vs positioning.  The drive is put in position mode, and LCNC (via caxis.comp and PID tuning) handles positioning vs velocity commands.

In the second example, the drive itself is switched between velocity and position modes using an input on the drive.  LCNC handles the mode switch command, as well as appropriate outputs to the drive depending on which mode is desired.

Neither one of the methods is 'official' Linuxcnc.  That means you won't find official simulations & examples, nor will you find caxis.comp in the official repository.

If you only need to index the C-axis, it will be significantly easier to use orient.comp to position the spindle.  Simplified, orient.comp works by creating two PID loops (one for velocity, one for position), and switching between the two using an M-code.  With orient.comp, there is no 'C' axis available to command - just the spindle through M3/M4/M5 and M19 to position it.

When stopped, the spindle can be positioned at any location using an M19 command - just fine for drilling or X/Y axis milling.  And with a servo-driven spindle the position should be pretty stable.  Heavy milling or drilling which imposes a significant rotational force on the spindle would likely require a brake of some sort.

However, if you need continuous spindle movement coordinated with one or more other axes (X/Y/Z) during milling you will have to use one of the above 'unofficial' methods (or create a new scheme).

@Aciera - 

I had hoped to duplicate your C-axis process back when you were working on it, but my drive doesn't permit on-the-fly mode switching via external input.

Since I don't think I can use orient.comp and caxis.comp on the same joint, I'm thinking about ways to un-home and re-home the joint/axis.  Caxis.comp doesn't re-home or move to C0 whenever the spindle stops - it returns to the same position it was in when the spindle command was issued.

Since I don't need to freewheel in the middle of a program, what do you think about using halui to unhome/rehome the C-axis?

• Freewheel button ON (M-code)
  • set halui.joint.C.unhome
  • Latch encoder reset pin HIGH (to keep it at 0)
  • Amp enable OFF
• (manual spindle rotation activity)
• Freewheel button OFF
  • Amp enable ON
  • Unlatch encoder reset pin
  • set halui.joint.C.home

See any major issues with the above before I try testing it this evening?