Welcome to the SeeMeCNC Community

I posted this in my build zone thread, but wanted to post this her as well of insight that someone will have.

Thanks,

Dan
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So I finished off my Restock MAX v2 this AM and it looks AWESOME. I will post pictures. Loved putting it together with the Kids and had no problems or questions. Very, very smooth assembly other than the prior noted overheating of the solder pads.

I turned it on without problems, uploaded the software without problems. Played with the X, Y, Z controllers..... Totally cool!!!

I performed all the checks: The PID algorithms for the hot end, PID for the and bed and set the values in the EEPRrom settings. It came to the temps quickly and I had no issues. I set up the Z-Stop height, the macros and the printer powered off like I hit the power switch I was entering in the terminal command G0 Z5 X90 Y0 F3500 as detailed on page 239 of the build instructions. No other issues.

I turned it back on and was powered back up without problems and when I turned on the tip and bed to 190 and 55 degrees it came back up to temp and stabilized. After about 5 minutes of watching, it turned off again. No smoke or anything. So I turned it back on and was able to home, temp came back up to 190 and 55 and I rechecked the Z5 X90 Y0 F3500 command without problems.

I monitored it for another 15 minutes without problems while turning the hotbed and hot end on and and off a couple of times. Was able to adjust the temp correctly without problems. Able to run the X, Y and Z controller and etc without problems. Switch connections are OK, LED lights are OK.

This AM I powered it up, heated up the bed and hot end without problems. After 10 minutes it shut off again. I turned it back on and it was OK, warmed back up without problems. I turned off the bed and hot end and did notice that the Rambo fan picked up RPM. I turned it on and off a couple of time and it clearly affects the rambo cooling fan RPM. I turned it off ........ I have to go to work now......... Dang!!!!

Not sure why it is doing that...... Does anyone have any insight???

Thanks,

Dan
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Addendum:

I was thinking about this "Power Off issue" on my way to work.

When I did the PID algorithm, my averaged values were different than the default settings up. For example, my averaged PID's were:

Hot End:
Kp=14.78 (default = 31.36)
Ki=0.803 (2.18)
Kd=68.18 (112.9)

HotBed:
Kp=49.22 (87,86)
Ki=0.883 (3.01)
Kd=687.2 (641.82)

I'm not sure how these settings affect the power draw? Is this possibly a reason why it's powering off suddenly.

Dan

You might just have a bad PSU, ATX power supplies will turn off if you draw too much power, they do the same if you have a short.
Contact SeeMe and see what they suggest.

Update:

Talked with support and they are sending a new power unit tomorrow. Have now found others that are also having trouble with the Diablotek DA Series 600W ATX.

Haven't heard what they are sending yet. Hope it is good since I want to add a second Hot End eventually. Will update you when it arrives.

Thanks for all the great info on this site and comments.

Dan

Check you power switch connections.

Great minds think alike. I did double check the on/off switch as well as the power connections from the Rambo. Would love it to be an easy fix.

My power supply died right away too. I was unable to get a new one supplied, (their solution was to remove the rear cover to allow better ventilation) so bought a 700 watt that has worked fine. Good luck!

An Update from SeeMeCNC Support: They have been awesome!

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Dan,

That is indeed the power supply that has been giving us the issues recently. We have returned all the stock we had to the vendor and now are shipping out Viotek power supplies which we used to ship and have been experiencing no current power supply issue reports with them. I have one ready to ship to you.

That's great. I guess I wasn't as lucky.

Be careful what you wish for. Mine came with a 550W Viotek p/s and it shut off numerous times when printing ABS (higher bed temp and higher extruder temp, so more load on p/s). Had to add extra cooling to run reliably and still has terrible voltage regulation.

I have looked and not sure I see a consensus on what is the optimal power unit to upgrade to if you are wanting stability and to run multiple hot ends.

My vote is if you don't mind working with AC power is to totally skip the PC power supply CRA... err... questionable units and go with an industrial supply.

The Corsair 750 modular is one of the highly recommended supplies by users of this forum.

I can endorse the RM750. I have used it in several projects with no complaints. It is a true single rail P/S with all wiring being modular.