Heated bed / extruder heating resistor failure

[ezr...@googlemail.com]

Hello,

when J heat my j-head nozzle over 260°C my bed temperature suddenly raises over 300°C even if it is not powered.
I've tried changing my pcb heated bed to the resistors but its still the same problem.

Thanks Robert

[Jorge Pinto]

2013/6/3 <ezr...@googlemail.com>

Hello,

when J heat my j-head nozzle over 260°C my bed temperature suddenly raises over 300°C even if it is not powered.
I've tried changing my pcb heated bed to the resistors but its still the same problem.

Hello Robert.

This maybe a bug on the electronics and/or firmware.

Can you please test and tell what values of temperature of get for the bed while the extruder have:

Extruder: 200ºC; Bed: xxºC

Extruder: 240ºC; Bed: xxºC

Extruder: 260ºC; Bed: xxºC

Extruder: 280ºC; Bed: xxºC

Thank you.

Jorge Pinto

bitBOX team.

[ezr...@googlemail.com]

Hello Jorge,
Thanks for you response, i made screenshots from the pronterface diagram showing the results.

220°C is'nt worth posting, bed temperature stayed at 18°C
240°C also stayed at 20°C but due a temperature spike it got over 260°C (exactly 267°C) then the bord temperature raised over 300°C
260°C is quite self explaining.

Also i am using 1.0.2 Firmware

[ezr...@googlemail.com]

Hello again,

I've updated my firmware version to 1.0.3 and it seems the problem is now gone.

thanks for your support!!

[Jorge Pinto]

2013/6/6 <ezr...@googlemail.com>

Hello again,

I've updated my firmware version to 1.0.3 and it seems the problem is now gone.

thanks for your support!!

Good to know. Thank you.

Jorge Pinto,

bitBOX team.