Author Topic: Platen heater not working  (Read 3711 times)

Offline don_kleinschnitz

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Platen heater not working
« on: March 12, 2014, 01:38:45 AM »
My platen heater stopped heating this AM...
Software says it is but it never changes temperature?


Now what.....
Anyone have a heater fail?



Offline Ian K

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Re: Platen heater not working
« Reply #1 on: April 09, 2014, 11:36:24 PM »
Loose cable connection, from power?  from thermostat? Blown thermostat? Heater bed malfunction(replace?)?
For a quick workaround, hit it with a hair dryer or heat gun until a few layers are printed?
Not from experience with this particular problem, just some thoughts.

Cheers Ian K
One good turn . . . . .  gets most of the blanket!

Offline Andy_imagine3d

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Re: Platen heater not working
« Reply #2 on: April 19, 2014, 02:06:05 PM »
I get the opposite problem, I am currently being told the platform is too hot, but the temp reading from the software says its at the right temp or printing. Ideas?

Slainte,

Andy

Offline don_kleinschnitz

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Re: Platen heater not working, fixeed
« Reply #3 on: April 24, 2014, 12:12:24 AM »
This is a late update just to share the solution.

The platen heater had a high resistance connection, I suspect a manufacturing defect in the way the wire was crimped.

It was replaced under warranty.

The symptoms:
The software said the heater was heating but the temp never increased.
[This is because the connection to the ceramic heater had a high resistance (70+ ohms) and the heater could not get enough current]
This circuit carries a lot of current and connections must be excellent or power is dissipated across them heating them up and accelerating a failure.

Testing:

Pull out the heater PCB and check the resistance across the heater circuit it should be about 7 ohms.

Replace the heater if the circuit reads other than 7 ohms. The replacement process is pretty straight forward and you will get instructions with the part.

Picture of failed unit attached

Offline don_kleinschnitz

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Re: Platen heater not working
« Reply #4 on: April 24, 2014, 12:14:53 AM »
Andy,
Just saw your post, don't know if you have fixed this or not.
There is also a temp sensor on the platen connected to the same board as the heater (next to it)

Perhaps there is a bad connection or the temp sensor is not working?

Offline airtune

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Re: Platen heater not working
« Reply #5 on: June 23, 2014, 08:03:24 PM »
Obviously a common problem, check out my pic and of course its just out of warranty, wonder if they have made a change to the up plus 2.