Jump to content
Ultimaker Community of 3D Printing Experts
umagi

Is it safe to leave Ultimaker2 DC switch always ON and use AC switch instead?

Recommended Posts

Hi

I don't know if this may be a problem or not, but I use an external SPST (single pole, single throw) switch at the AC side and I leave the switch on the PCB (i.e. DC side) always ON (I did this due to mounting and accessiblity problems in my build). The AC switch turns the Switched power supply on and off, of course.

I am really at the end of my wits here, trying to figure out why my Ulticontroller keeps blowing up (chip U3).

If the above is not a problem, may my problems be due to bad power supplies? If so, how can I check that?

Any help is welcome as these problems are getting very frustrating...

Thanks!

Edited by Guest

Share this post


Link to post
Share on other sites

Hi Umagi,

First to your procedure powering up the Ultimaker, -you did not state the model you have but I'll assume UM2 here.

As there is a DC power switch, this one should be switched on last and off first! First AC then the DC! The reason for this might be a slow rising voltage from the DC power supply delivering power to a "computer". As such slow ricing voltage may prevent a proper start reset; this might be the reason for the DC switch... But this answer should normally come from the producer.

You also said that the U3 IC has been blowing up, -how many times?

As there are two more OP amps as U3, with supply voltages paralleled, I doubt this problem is caused by the power supply. This U3 OP amp is used for amplify the signal from the (platinum) PT100 temperature probe no1.

Here I would check the wiring from the extruder and to the control board. The fact is that the heater (containing one wire with 24 VDC and another coming from the PWM controlled ground reference). If the 24VDC line is intermittently come in contact with one of the (two) wires from the PT100 temp sensor, your U3 OP amplifier will be history.

Please check those wires carefully, the part to mostly pay attention to is; the wiring part from the extruder –to the feeder –also through the hole close to the feeder motor.

Those wiring thats allways move.

One last question, does this occur during printing (loosing temp and stop)? Or?

Good Luck.

Torgeir.

Share this post


Link to post
Share on other sites

Ok. Have no problem with that, however I'll never said it will blow up, it's is all about a safe reset sequence. Also, -there is a power switch on a PC.

Not to start a big argument of this, but I'll been working for a very long time with electronics -and just offered my opinion/experience here.

Thanks.

Torgeir.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • How to 3D print with reinforced engineering materials
      Ultimaker is hosting a webinar where we explain how you can achieve and maintain a high print success rate using these new reinforced engineering materials. Learn from Ultimaker's Product Manager of Materials and top chemical engineer Bart van As how you can take your 3D printing to that next level.
      • 0 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!