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With all the new parts done I began taking the machine apart starting with the head.



 

After that I did a test fit of the adapter plate for the new head which thankfully was a very tight fit.

 

With the fitment confirmed I proceeded with removing the z-axis carriage from the machine.

 

 

While I had everything apart I took the chance to make a CAD model of the mount for the z-axis ball nut so that I can make one for a ball screw later on.

 

Next I proceeded with adding oil grooves to the z-axis carriage.

 

The stock head of this machine is attached using one center bolt and 3 outer bolts. The new head that I designed uses one more outer bolt for better rigidity. However the outer bolts have an oddly shaped head but luckily I manage to find a matching bolt.

 

Here are the finished sleeves and the springs that hold down the pneumatic cylinder when it's idle. Used a set of old valve springs and retainers that were turned down a bit.

 

 

 

 

I have milled all of the parts now so it's time to start the assembly.

 

 

Here is a quick test fitment of some of the parts that will go on the new head.

 

Here is a temporary setup to test if the stacked pneumatic cylinder was strong enough to release the drawbar.

 

The test was a success and confirmed that the pneumatic cylinder could release the drawbar without any issues at 8 bar of air pressure.



 

Once I had confirmed that the cylinder was working as intended I promptly put it in the bandsaw and shortened it a bit 

 

 

The next step is to make some aluminum sleeves for the four long bolts that hold the pneumatic cylinder to the lower fixture.

In order to fit the new spindle I'm gonna have to replace the whole head of the machine. So I designed a two piece design with an adapter plate that bolts on to the stock Z-axis.

 

The reason why I did it in two parts is to be able to reuse the head itself when I move on to a larger machine frame some time in the future.

As the 120 mm hole in the head the for liquid cooled spindle needed to be made with very high precision I opted to have the parts made for me. This also enabled me to have the critical surfaces ground flat at the same time.

Here are the machined parts as they where delivered to me. Visible on the left side is also the pneumatic air cylinder I managed to find eBay.

 

I try to avoid hydraulics as much as possible and so I was very happy to find a used stacked four stage 100 mm Festo pneumatic air cylinder for a very good price. It should provide enough force to release the drawbar in the new spindle at 8 bar of air pressure.

Here is how I have planned the milling head to looks with everything installed (with and without the top cover).

 

 

I 3D printed a test piece of the front button panel just to test the fitment and I think it came out okay.

 

I've created 19 different CAM programs to make all the remaining parts from aluminum which kept me busy for a while.

In order to reduce the load on the spindle bearings I'm going attach the mount for the pneumatic air cylinder with springs so that the majority of the clamping force goes in the to the drawbar instead of the bearings. Hence the slightly more complicated setup compared to my old setup.

 

After a longer than usual summer vacation break I've started another round of upgrades on the milling machine.

The first thing I did was to try and fix the leaks from my "Lincoln" clone progressive oil distribution block.

 

The tapered threads for the connections are not of the best quality and the built in check valves leak quite a bit.

This resulted in air in the lines if I didn't run the pump for the central lubrication for every week or so when the machine wasn't being used. It also left a pool of oil on the floor below the oil distribution block.

 

In order to try and fix this I removed all the connections from the block, cleaned the threads with brake cleaner and then reassembled it with Loctite thread sealant.

 

 

Then I added these small low pressure metal check valves I found on Aliexpress.

 

 

These changes seem to have significantly reduced the leakage from the oil distribution block and so far I have had no problems with air in the oil lines.

For GPIO it's in_not

INM is a better choice for inputs though  because it has built-in
debouncing if needed.

weird but this works
{HMOT](CARD0).inm.00.input-00-not

Thanks

I tried that and get the following error:

Pin 'hm2_7i96s.0.gpio.000.in-not' does not exist

Works okay without the -not

[HMOT](CARD0).gpio.000.in-not

Thanks for the help. Sending this because I'm not sure I posted my next question in the right way..

Hallo Juergen,

danke für den Screenshot. Ein paar Fragen, damit ich das nachstellen kann:

1. Welche Distribution und Version läuft (z. B. Debian 12 vom LinuxCNC-Image)? Live-USB ohne Installation oder installiert?
2. Welchen Eintrag im Menü Hilfe haben Sie angeklickt: Benutzerhandbuch, Nach Updates suchen, Diagnoseprotokolle exportieren oder Über Takshak?
3. Wie lautet die Fehlermeldung genau? Die beiden Meldungen rechts oben im Screenshot ("Install Failed" und "Not running on one of the supported Live systems") stammen nicht von Takshak.
4. Wie wurde Takshak gestartet, AppImage per Doppelklick oder im Terminal? Am hilfreichsten: im Terminal starten mit ./Takshak-1.0.5-x86_64.AppImage, dann Hilfe anklicken und die Terminalausgabe hier einfügen.
5. Falls es noch geht: Hilfe → Diagnoseprotokolle exportieren, und die ZIP an die Support-Adresse senden.

Für künftige Fragen und Meldungen gibt es übrigens unsere eigene Community unter hub.takshakcam.com. Dort sehen wir alles sofort, und wir möchten das LinuxCNC-Forum nicht mit Takshak-Themen belegen.

Viele Grüße
Georg

Thanks for the help, making much progress. New question:
What is the syntax to negate these inputs?

# external input signals

# --- MIN-X ---
net min-x     <=  [HMOT](CARD0).gpio.000.in

# --- MIN-Y ---
net min-y     <=  [HMOT](CARD0).gpio.001.in

# --- MIN-Z ---
net min-z     <=  [HMOT](CARD0).gpio.002.in

# ---setup home / limit switch signals---

net x-home-sw     =>  joint.0.home-sw-in
net min-x     =>  joint.0.neg-lim-sw-in
net x-pos-limit     =>  joint.0.pos-lim-sw-in
 

My crystal ball has stopped working....
More info, pictures, configs...

Hi all;

My question is simple. No changes have been made to wiring or configuration, yet Y2 stopped working. I verified connectivity between the motor and the breakout board, all is good. I next tried swapping the plug position between my A axis and the Y2 axis, modified the hal file to reflect the swap and restarted LCNC. Now the X axis has joined the problem. Z still responds correctly.
What is more likely, a failure of my MESA 7i76U driver board or the breakout board or both?

Kind Regards,

Ich habe einen Fehler
beim Anklicken von Hilfe bekomme ich diese Fehlermeldung
I have a mistake…..
When clicking on help I get this error message

king regarde
Juergen