Heatbed temperature flickering with MINTEMP BED alarm  

RE: Heatbed temperature flickering with MINTEMP BED alarm

Bed temperature errors are usually a broken wire to the thermistor.   I have had to replace 2 of my 8 printers due to a similar error at 6 months to a year.  

RE: Heatbed temperature flickering with MINTEMP BED alarm

I came to the same conclusion, spoke to a customer rep a few days ago and got a spare thermistor shipped to me under warranty (printer is 11 months old).

this was the 1st time I had to issue a claim, and I have to say customer support is very effective for this printer.

RE: Heatbed temperature flickering with MINTEMP BED alarm

@fabrizio

I always keep a few extra thermistors on hand.  

RE: Heatbed temperature flickering with MINTEMP BED alarm

I also had to fight with broken or wobbly thermistor wires. The thermistor itself was never defective. For this reason I bought AWG26 heat resistant and flexible silicone wires and replaced the thermistor wires with these (print bed and hot end). Since 2 years now no cable is broken anymore. I soldered the wires and stripped them with a heat shrink tube. But be careful not to solder too close to the thermistor, otherwise the solder can melt.

RE: Heatbed temperature flickering with MINTEMP BED alarm

I'll probably do the same, good advise

RE: Heatbed temperature flickering with MINTEMP BED alarm

Posted by: @karl-herbert

I also had to fight with broken or wobbly thermistor wires. The thermistor itself was never defective. For this reason I bought AWG26 heat resistant and flexible silicone wires and replaced the thermistor wires with these (print bed and hot end). Since 2 years now no cable is broken anymore. I soldered the wires and stripped them with a heat shrink tube. But be careful not to solder too close to the thermistor, otherwise the solder can melt.

could you please tell which wire size you chose for the repair? thanks

RE: Heatbed temperature flickering with MINTEMP BED alarm

@karl-herbert

My issue is usually broken wires near the thermistor / heater block.  Never as lucky as you.  

RE: Heatbed temperature flickering with MINTEMP BED alarm

@fabrizio

I have had good success with original E3D Thermistors, but I also use some I purchased from China in 5 a pack.  They seem to be equivalent.  You get 5 for less than 1 and I have not noticed a difference in performance.  

RE: Heatbed temperature flickering with MINTEMP BED alarm

Posted by: @cwbullet

@fabrizio

I have had good success with original E3D Thermistors, but I also use some I purchased from China in 5 a pack.  They seem to be equivalent.  You get 5 for less than 1 and I have not noticed a difference in performance.  

took note, seems to be a trouble free solution 👍 

RE: Heatbed temperature flickering with MINTEMP BED alarm

@cwbullet

I am referring more to the area of constant alternating movements, especially at the heating bed. Most of the time the cables are damaged in the clamping area. Of course the hotend thermistor in the area of the heating block is also very sensitive and will break quickly if you are not careful when changing the nozzle.

RE: Heatbed temperature flickering with MINTEMP BED alarm

@karl-herbert

I did the same on my hotbed.  It continues to work fine after 18 months.  My hotend thermistors are the ones I replace more. 

RE: Heatbed temperature flickering with MINTEMP BED alarm

Spare thermistor has arrived and it was installed without problems. Printer back to work smoothly. 

RE: Heatbed temperature flickering with MINTEMP BED alarm

Good to hear.  As I said above, but not as clear, I recommend you have one bed and one hotend thermistor in a drawer for that rainy day when they break.  

RE: Heatbed temperature flickering with MINTEMP BED alarm

Posted by: @fabrizio

Posted by: @karl-herbert

I also had to fight with broken or wobbly thermistor wires. The thermistor itself was never defective. For this reason I bought AWG26 heat resistant and flexible silicone wires and replaced the thermistor wires with these (print bed and hot end). Since 2 years now no cable is broken anymore. I soldered the wires and stripped them with a heat shrink tube. But be careful not to solder too close to the thermistor, otherwise the solder can melt.

could you please tell which wire size you chose for the repair? thanks

 

For the thermistor wires look here: AWG 24-26 or similar

RE: Heatbed temperature flickering with MINTEMP BED alarm

Posted by: @karl-herbert

Posted by: @fabrizio

Posted by: @karl-herbert

I also had to fight with broken or wobbly thermistor wires. The thermistor itself was never defective. For this reason I bought AWG26 heat resistant and flexible silicone wires and replaced the thermistor wires with these (print bed and hot end). Since 2 years now no cable is broken anymore. I soldered the wires and stripped them with a heat shrink tube. But be careful not to solder too close to the thermistor, otherwise the solder can melt.

could you please tell which wire size you chose for the repair? thanks

 

For the thermistor wires look here: AWG 24-26 or similar

Great find!  They also sell it inshorter lengths.