[JohnZ]

Thank you so much for that information. I kept those power supplies around for a future project like this some day but could not find the info for how to use this model out of the servers.

What we found was that the servers would keep running, but after about five years of 24x7x365 power on state that the servers started to fail if they ever needed to be power cycled. Those caps could pass power to keep it running, but not the surge to power on. The >80% failure rate was at a remote DR data center where we started losing communications to multiple servers after some maintenance. I flew out there and we had a full 85% failure rate of the gen 5 servers, all traced down to those caps. We found many to be swollen, and found the same problem on the Gen 5, 6, and 8 servers. Ditched the entire line by the time gen 8 came out. I had some deep discussions with the engineers, then spent a week at a competitor with their engineers diving deep into his their systems were built and they addressed this situation (and many others).

Once again, thank you so much for this information.

John Z

Sent from my SM-G991U using Tapatalk

[A_Camera]

I am glad that my information helped you out. Good luck using the server PSUs. Just be careful... it outputs a lot of power, so you should add some fuses on the secondary side, just in case...

[A_Camera]

It's been a long time ago I posted any updates regarding this project, I was simply busy with some other activities, some hobby related some not, so I had no time to post anything.

It's time again for another video. The major difference is that after my tests and the last video, I decided to digitalize my DIY micro lathe since it works very well, not only for aluminium and brass, but also for steel. So I bought two steppers, made some tests, but then got busy with photography, buying new cars (EVs of course) and other activity, so the project got to a halt. However, a few weeks ago I thought that it's a shame not to carry on and finish it, so I fixed the two steppers more permanently and made some test cuts with the new CNC lathe, turning aluminium, threading, rounding and chamfering and my tests were so successful that I decided to make a video.

https://youtu.be/P0-3K8x2U9M

The video not only shows the CNC in action, but it is actually used for making a real thing, a micro chuck adapter, so that I can use that micro chuck for drilling with tiny drill bits when I am too lazy to use the ER16 collets. The results were surprisingly good and in fact, I was so happy with it that I decided to carry on, and ordered a new Multifix type tool holder, which I believe will improve it a lot. It is a real one, made out of steel, not like the one I am using now, which is aluminium. The one I have now works also, but is not that rigid, so there is a bit of chatter and vibration. But that is OK, considering the price. I bought it knowing it's limitations, but also was ready to buy something better in case I am otherwise happy with my DIY CNC lathe. So that will be my next upgrade, apart from small bits and pieces which I intend to do.

One such thing will be adding emergency stops. As it is now, if the servo would stall the steppers will continue pushing the cutter, which no doubt will cause damage. So that must be fixed as soon as possible, because it is not a good thing. If it happens I want the machine to stop immediately on it's own.

I am controlling the lathe with UCCNC, which does not have a lathe function, but for my intended use it works pretty well for now. The G code is manually generated by myself, and for now I am happy to do it manually. It gives me some experience in handling the lathe since I am totally new to this type of work, so the slow progress is an advantage and is giving me a learning experience.

Anyway, if you are interested, please watch this video.

[ardenum2]

you buy cars but you buy steppers?

[A_Camera]

you buy cars but you buy steppers?

Why not...? What's wrong with steppers...? I have never had any problems with steppers, but you have to know how to control them. Anyway, where is the connection between buying cars and buying steppers...? :nono:

[A_Camera]

I made a video regarding this upgrade and the making of the tool post holder screw and nut.

https://youtu.be/uQzUsYaM68Y

[A_Camera]

Recently I made several updates to my lathe, and it really improved things a lot. This "Poor man's Lathe" now becoming "Rich man's toy". Not because I regard myself as rich, even if I can't complain financially, but because the lathe is becoming more and more expensive. I think I am still a bit under what a fairly good miniature lathe would cost, but only just below, not a lot of margins... Anyway, I find it satisfying to make things, and now that I am retired I also have more time for my hobbies, so I will continue. The last video showed my tool post update, and I haven't made any new video yet about the lathe updates after that, but the major things are the following:

1. The servo is changed to 600W AC servo.

Attachment 510782 Attachment 510786

While the 180W 50V DC servo worked surprisingly well, I wanted some more torque and higher RPM, so I bought a 600W AC servo with a driver. This motor will allowed me to change the gearing from 1:3 to 1:1.5 so I will get a maximum chuck RPM of 2000 instead of 1000. The motor is strong enough for me at that speed.

I made some modifications to the S2 servo driver, added three LEDs and a small relay to the four outputs, and also a button to one input. Inside the driver there is more than enough space for the small PCB necessary for this modification. The parameters are set according to the following for this modification:

Attachment 510784

LED 1: Servo ready
LED 2: Servo motor power on
LED 3: Zero speed
Relay: Alarm detection
Button: Alarm reset

The relay NO output is connected to a 3.5mm contact, which in turn is connected to my eStop so that when everything is fine (no alarm) the relay is energized and the contact is shorted.When there is an alarm from the servo driver the relay will break the circuit and UCCNC will stop the G-code execution and all motors and halt. When the error condition is back to normal, by pushing the button the error flag is reset and the servo driver is ready again and UCCNC can start again. Of course, this condition is emergency stop, so the code can't continue from the same spot where it stopped. This works very well for me, the G code execution stops if there would be a problem, and the servo motor stops immediately also if I push the CNC eStop button, or if UCCNC would crash for whatever reason it may crash (for example network or power failure) so the safety is good.

I also changed the tool holder saddle plate from aluminium to steel, and I think that increased the rigidity as well.

The recent updates of my lathe turned out to be really worth wile, the 600 W servo is really making magic. Cuts steel as I never could do before and not really thought it ever will. The new servo is also a lot quieter, which is good as well, so I am very happy with it. My future plans are to actually make it a bit wider and maybe also taller. As it is, the "throat" (the space below the chuck) is too narrow, it does not swallow as much chips and swarf as I want to. It is fine for very small jobs, but as soon as I want to make something bigger, it needs to be cleaned a bit too often. Anyway, using it is a real joy now.

This is what I made on it this week:

https://youtu.be/808WNVtjevI

The round bar was not turned down on my machine, it was a 12 mm diameter 48 mm long piece readily available, but most of the work is done on my DIY CNC lathe.

[cnchome-beyond]

The lathe needs to be equipped with good tools and carbide blades. There are many good tools available for purchase on this website.
https://cnchome-beyond.com/
turning tool holder boring bar

[email protected]
Click Here to Email Me

[cnchome-beyond]

Your milling machine should be equipped with CNC tools and CNC blades, so that you can solve the processing of different materials, such as steel, stainless steel, cast iron, aluminum parts, and difficult-to-process materials. You can find the tools you need here. If you don't find the tools you need, you can also write us an email. Because the website is updated every day.
https://cnchome-beyond.com/
turning tool holder boring bar U drill

[email protected]
Click Here to Email Me