1 Topic by Ski52 (edited by Ski52 2016-09-04 16:54:42)

  • Ski52
  • Ski52
  • Member
  • Offline
  • From: Florida USA
  • Registered: 2013-10-23
  • Posts: 332

Topic: SD2 No Heat - SSR went south?

I have an SD2 that has been modded with s SuperNight PS & a SSR to control the heat to an aftermarket heat element.  I followed Wards plan & installed it a year/14 months ago.  Been working great, heats from room temp to 97C in ~ 3 min.  Today, it got to 61C and started to cool off.  Checked & replugged all connections - same.  Got the meter out and found 12V from the motherboard & 12V from the PS - 0V on the output side of the SSR.  The LED on the relay is red indicating, I think, overheating.  It's been bolted to the SD frame and hasn't given any probs in over a year. 

Think maybe the relay has bit the dust?

http://www.soliforum.com/misc.php?actio … str=3790f6

Just noticed red LED comes on immediately with power.  Label reads On - Green; Oh - Red.  I assume Oh is Overheat?

Post's attachments

SSR.jpg
SSR.jpg 56.56 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.
Ender 3 Pro

2 Reply by carl_m1968

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

Re: SD2 No Heat - SSR went south?

Do you have 12 volts on terminal 2 of the relay? Id so then your relay has died.. That is a Fotek relay which I work with a lot in my line business. There also many counterfeits out there where they buy relays with lower specs then relabel them to higher specs. You might have got a hold of one of those and have been over driving it thinking all was good.

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.

3 Reply by Ski52

  • Ski52
  • Ski52
  • Member
  • Offline
  • From: Florida USA
  • Registered: 2013-10-23
  • Posts: 332

Re: SD2 No Heat - SSR went south?

Thanx for the response Carl.  I do have 12V on term 2 of the relay - comes directly from the ps.  I don't know the useable life of these relays, but I've used the h3ll out of it for over a year.  I see on Ebay they go for ~9 - 10.  If I recall, I spent a lot more than 10 when I got this one. 

Consider it a consumable.. I'll order another today.  Let ya know how it works is a week or so.

Ski

Ender 3 Pro

4 Reply by wardjr

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

Re: SD2 No Heat - SSR went south?

Yeah DC to DC SSR's fail regularly.  Go for one that is way over rated if you can.

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

5 Reply by Ski52

  • Ski52
  • Ski52
  • Member
  • Offline
  • From: Florida USA
  • Registered: 2013-10-23
  • Posts: 332

Re: SD2 No Heat - SSR went south?

Well... I installed the new SSR and have exactly the same problem.  12V input from the MB, 12V from the PS, but 0V out from the SSR.  I get 4.8 - 5 ohms across the heating element. 
What next?  I'm at a loss.  The LED comes on in the new SSR so I believe it's working OK.  I think there would be 12V at the output of the SSR even if the heat pad was kaput - no?

Ender 3 Pro

6 Reply by carl_m1968

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

Re: SD2 No Heat - SSR went south?

Ski52 wrote:

Well... I installed the new SSR and have exactly the same problem.  12V input from the MB, 12V from the PS, but 0V out from the SSR.  I get 4.8 - 5 ohms across the heating element. 
What next?  I'm at a loss.  The LED comes on in the new SSR so I believe it's working OK.  I think there would be 12V at the output of the SSR even if the heat pad was kaput - no?


Not if the heat pad is shorted.. If it was shorted and you are using ground as a reference then you will get no voltage on the SSR output.

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.

7 Reply by Ski52

  • Ski52
  • Ski52
  • Member
  • Offline
  • From: Florida USA
  • Registered: 2013-10-23
  • Posts: 332

Re: SD2 No Heat - SSR went south?

I think the heat pad is toast.  I was trying to read voltage across the output - pins 1 & 2 - they are both positive (doh).  From the ps to pin 1 & 2 reads 12V, but the pad reads ambient.  I should have realized earlier - RH is showing voltage going to the pad with no temp change. 
I searched for a 3 hole 150mm sq pad - no go.  Should have bought more than 1 when I got this one.  I think I have devised a way to mount a solid pad.  I have another undrilled piece of flat aluminum.  I can make some mounts to sandwich a new pad between the original bed and the second piece.
After hooking the pad directly to 12V with no temp change, I think this one is bad.
Suggestions?  Or should I just replace the pad?
Ski

Ender 3 Pro

8 Reply by AZERATE

  • AZERATE
  • AZERATE
  • PRINTiT
  • Offline
  • From: Chicago
  • Registered: 2013-11-28
  • Posts: 2,077

Re: SD2 No Heat - SSR went south?

If needed, I do have a 6x6 silicone heater I have not installed.
Send me a PM if you're interested

Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!

9 Reply by elmoret

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

Re: SD2 No Heat - SSR went south?

What's the resistance of the heated bed, not connected to anything else?

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

10 Reply by Ski52

  • Ski52
  • Ski52
  • Member
  • Offline
  • From: Florida USA
  • Registered: 2013-10-23
  • Posts: 332

Re: SD2 No Heat - SSR went south?

Strange - yesterday I got 4.8 - 5 ohms.  Today, just now, I get 528...

Ender 3 Pro

11 Reply by Tin Falcon

  • Tin Falcon
  • Tin Falcon
  • Member
  • Offline
  • From: New Jersey, USA
  • Registered: 2014-08-01
  • Posts: 2,424

Re: SD2 No Heat - SSR went south?

cracked trace ? loose / cold solder connection??.

Also best practice to use clip on connections with wires. I think most of us have used the quick and easy finger clip method . But wet sweaty hands can easily give false readings, DAMHIKT

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura