1 Topic by Fedde

  • Fedde
  • Member
  • Offline
  • Registered: 2013-08-03
  • Posts: 16

Topic: Solidoodle powerspike (Again!)

Hi!

experiencing some problems with my printer, or ive had problems for 1 year, but not being able to solve them.

It all started when my heated bed wouldnt heat anymore, there is no power coming out of the bed-port on the board.

I bought a 200w replacement and hooked it up to a 350w ATX powersupply, i also hooked up the rest of the printer to a seperate 350w atx supply.

When printing, it all of a sudden stops when i get a small powerspike, if the heated bed turns on/off, (im using a temperature controller and a relay, so i hear it clicks, and then it stops)

Ive tried hooking it up to a UPS, but that doesnt seem to help.

Any other options? I would like not to change to ramps/rumba not just yet.

2 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Solidoodle powerspike (Again!)

You're overloading your power supply. A 350w ATX supply can't output all 350 watts on just the 12v rail, it has to be distributed across all rails.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

3 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: Solidoodle powerspike (Again!)

You need to get a dedicated 12 volt only supply. Those ATX supplies are all mostly garbage and dont even do rated current. Which for most is 12 amps at most on the 12 volt rail. Thats not enough for a 200 watt bed. That bed will draw just over 16 amps while heating at 12 volts roughly. You need to invest in a couple of 30 amp supplies like these.

http://www.amazon.com/gp/aw/d/B00LIBRKQ … amp+supply

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

4 Reply by mmiller7 (edited by mmiller7 2015-11-10 22:50:29)

  • mmiller7
  • Member
  • Offline
  • Registered: 2015-07-26
  • Posts: 29

Re: Solidoodle powerspike (Again!)

carl_m1968 wrote:

You need to get a dedicated 12 volt only supply. Those ATX supplies are all mostly garbage and dont even do rated current. Which for most is 12 amps at most on the 12 volt rail. Thats not enough for a 200 watt bed. That bed will draw just over 16 amps while heating at 12 volts roughly. You need to invest in a couple of 30 amp supplies like these.

http://www.amazon.com/gp/aw/d/B00LIBRKQ … amp+supply

This is exactly right.  I've seen this using ATX supplies for other things as well.  Even when they don't shut down, they sag a LOT under load, I have a 250W microATX power supply running a 50W radio and it sags to 11V regularly.

Getting a proper 12V supply such as the one linked above is one idea, alternatively you could use a modified SERVER power supply which is a popular option in R/C groups for cheap high current 12V power that is designed to run most/all of the power on the 12V rail.
http://www.rcgroups.com/forums/showthread.php?t=1292514

5 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: Solidoodle powerspike (Again!)

mmiller7 wrote:
carl_m1968 wrote:

You need to get a dedicated 12 volt only supply. Those ATX supplies are all mostly garbage and dont even do rated current. Which for most is 12 amps at most on the 12 volt rail. Thats not enough for a 200 watt bed. That bed will draw just over 16 amps while heating at 12 volts roughly. You need to invest in a couple of 30 amp supplies like these.

http://www.amazon.com/gp/aw/d/B00LIBRKQ … amp+supply

This is exactly right.  I've seen this using ATX supplies for other things as well.  Even when they don't shut down, they sag a LOT under load, I have a 250W microATX power supply running a 50W radio and it sags to 11V regularly.

Getting a proper 12V supply such as the one linked above is one idea, alternatively you could use a modified SERVER power supply which is a popular option in R/C groups for cheap high current 12V power that is designed to run most/all of the power on the 12V rail.
http://www.rcgroups.com/forums/showthread.php?t=1292514


I have one of those that is a 75 amp running my mini kossel printer.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

6 Reply by Fedde

  • Fedde
  • Member
  • Offline
  • Registered: 2013-08-03
  • Posts: 16

Re: Solidoodle powerspike (Again!)

Update:

Tried with a new powersupply that delivers 32 amps on 12v(measured)

Still the same, when the relay to the heated bed clicks on or off(not always on the first click), the printer freezes.

Tried running the heated bed on a seperate powersupply, isolating it completlety from the printer(i use a 3rd party temp controller for it too) Didnt help.

Im suspecting my mechanical relay for the bed causes some kind of noise when it turns on or off, will a solid state relay cause less noise?(not audible noise lol)

7 Reply by wardjr

  • wardjr
  • wardjr
  • Moderator
  • Offline
  • From: Minnesota
  • Registered: 2013-06-10
  • Posts: 5,624

Re: Solidoodle powerspike (Again!)

Yes an SSR will produce little to no electrical noise/static. You might consider a USB cable with better shielding.

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

8 Reply by Fedde

  • Fedde
  • Member
  • Offline
  • Registered: 2013-08-03
  • Posts: 16

Re: Solidoodle powerspike (Again!)

Will try, it may be the usb cable as well now(tried several before) because as it is now i tried hijacking 5v from a powersupply to the 5v inside the usb cable, just to see if that was the cause.