Error on Thermistors

weput

is there not a gas station or anything like that you can get a fuse from? (they might not have very small values though, but might for motor cycles)

the smaller they had was 10 amps... the fuse should be rated for 100mA... max 200

way too much current.

weput

Just to let you know guys (assuming you care)

i pull out a potenciometer from my electric guitar... so the printer is going to be running soon.

dc42

@weput said in Error on Thermistors:

ok guys...

we are still in lock down so no luck to getting the fuse or the resistors...

(im fine as i have another printer running...)

Anyways, I'm thinking on breaking one of those x-mast decoration light cords (the ones that comes with like 150 small bulbs wired in series) to use one incandescent bulb... its a low resistive lineal load and if something happens it should manage the power by emitting light...

.,.. then i recalled i have a few small led's laying around... technically the same principle with the 0.7v drop.... anyways,

here im asking.. what do you think?

The incandescent bulb should work.

weput

@dc42 (y)

weput

funny...

i was about to place the fuse... but because i had to remove the cables i had fro the potensiometer...

... checked the continuity and happens that the original fuse has continuity.

weput

stupid question...
what is the actual resistance i should measure between vssa and gnd?

the thermistors are oscilating way too much...

A Former User

@weput pretty much 0, single digit omhs at most.

weput

my small ohmmeter is a cheap old analog type...10ohm and 1k selector...

resistance was 8~9 ohms if this is ok.

I'm leaning towards to replace the fuse.

A Former User

@weput said in Error on Thermistors:

8~9 ohm

datasheet for the replacement part suggest 0.6 to 2.5 ohm, but early boards could use a different part.

do you get a 0 reading if you touch the probes together?

weput

@bearer said in Error on Thermistors:

touch

let me check...

do you want me to measure the resistance on the thermistor connection?

by the way, this is the temp reading i have.

A Former User

@weput said in Error on Thermistors:

do you want me to measure the resistance on the thermistor connection?

no, just measure the resistance from the red probe straight to the black probe, to check if the meter will give you a reading of 0 when the resistance should be 0.

weput

the ohmimeteris fine.

A Former User

I'd expect a larger value for it to be the cause, on the other hand if it worked with the workaround (lightbulb or resistance?) then the fuse is what remains - if you have the spare then just replace it.

(OR solder the new on top of the old, should be less risk of damage to the board)

weput

yes thats what im gonna do... (tomorrow).

my eyesight is kinda tired... yes, im getting old.

weput

this bellfuse is definitely bigger than the one that was installed.

weput

assuming you guys care...

definitely the fuse was faulty... it measured around 13ohms when measured off the board... but the part was really tiny... who knows.

the belfuse was dead zero... I placed it on the back as shown on the dozuki link provided... still pending the 10kohm resistor...

anyways, this is my temp reading graph now.

A Former User

@weput said in Error on Thermistors:

the part was really tiny

interesting, which revision of the board was it you had, look at the silk screen, on the top of the board.

good job on getting it sorted in the end!

weput

@bearer said in Error on Thermistors:

good job on getting it sorted in the end!

is hardware version 1.0 m8