Jump to content
Ultimaker Community of 3D Printing Experts
hampzter

Help with heat reading problem with custom heated bed

Recommended Posts

Hey.

I bought this kit from eBay:

http://www.ebay.com/itm/Heated-Bed-Kit-for-Ultimaker-Reprap-3d-Printers-MK2-PCB-Aluminium-plate-/161157442118?ssPageName=ADME:L:OU:GB:3160

(There is a "primitive" wiring description on the bottom of the page. And yes, I know it uses a relay instead of MosFET. Will change that later! :wink: )

Now to my problem. Whenever my Ultimaker needs more heat on the bed and starts it, the temperature on the nozzle plunges about 6 degrees.

This is REALLY annoying and I can't really figure out where the power thief is that is.

Is there anyone out there that has any idéas?

Regards,

</Jonas>

 

Share this post


Link to post
Share on other sites

Yes. I have solder the 4.7kOhm resistor there. I tried measure it (though while solderd) and got 4.7kOhm through it also, so I think that part should be ok.

I power it with a switched power supply (this one: http://www.aliexpress.com/item/250W-24V-Small-Volume-Single-Output-Switching-power-supply-for-LED-Strip-light/628583985.html ). Though I had to take it down to 20v instead of 24v or otherwise it hit the limit of 10A.

 

Share this post


Link to post
Share on other sites

Now I have tried building a mosfet-controller for the on/off of the bed and I still get a big dip in the heat reading when the bed activates and a big jump up when the bed stops loading.

Is there anyone that has an idea on what I can do to make this not happen?

Or any idea of where I should search for the error in temperature reading..

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

    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
      • 1 reply
    • "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!