exxos's Atari, Amiga & retro forum

Place your bets! :lol: :fire: :fire: :fire: :hide: :coffee:





There is nothing like the smell of burning plastic in the afternoon :lol: Makes a change from usual semiconductor burning smell I guess :lol:


EDIT:

Oh, The burning plastic was actually the Z-motor assembly on the verge of melting again.. :lol: .. So emergency stop and set the amps to the motor time....

Well that is another thing which is wrong in the grand scheme of things. Setting the motor current with M906 changes the values in the firmware and are displayed back correctly, but they are not actually set to the motor :roll:

The Z motor I guessed that it would need 200mA ages ago, but even setting the power to 10mA the motor was burning. So I just cut one of the motor cables and put my meter on it and saw it was pushing 550mA!

As these boards have a trim pot, I just turned it on till I got down to about 200mA. So I assume this will stop the motor burning now.

Where's the Z-probe when'ya need one!


3rd time lucky maybe...

The problem with the bed is manually getting it level is a pain when I can only tell by printing out a trillion squares. So I've ordered an induction probe. No idea how to set it up, or mount it, or owt. But I guess I could fit a LED onto it or something as a indicator to getting the bed level. Overall it looks to be printing OK ..

Not much time for stuff today as been busy rewriting forum and store code again.

My induction sensor has come. Hacked a bracket off thingiverse to fit it. Though I was sure the part cooling fan was working before , only it's not. In fact it's not even plugged in :roll: turns out the extruder fan is plugged in where the cooling fan should go. Problem is, I've no idea where the extruder fan goes now :roll:

Been looking though the marlin code and seems the extruder auto fan is enabled. But there is no clue at all where that output is going. There are 6 fan headers all with LEDs on them. So in know when a fan comes on. Just only 1 light does, and that's the part cooling fan. So no idea what's going on now :roll:

I figured it out.
To:
Now the extruder fan comes on when the heater gets over 50c :)

FF printer seems to have got worse for no reason. Just changed the print head and tube but didn't help. Its like the PLA is leaking out of the head at random causing a blobby mess and no idea why :(

exxos wrote: 08 Feb 2022 17:10 FF printer seems to have got worse for no reason. Just changed the print head and tube but didn't help. Its like the PLA is leaking out of the head at random causing a blobby mess and no idea why :(

I find white filament a pain to work with. Due to the pigments it behaves differently from the other colours.

Icky wrote: 08 Feb 2022 19:00 I find white filament a pain to work with. Due to the pigments it behaves differently from the other colours.

I have the most problem with black :lol:

I slowed the acceleration down as it was geared up for the other printer :roll: Gone from 1000 to 200 and things are a lot better now.


I think the main problem is there seems to be some X-wobble. Though I cannot really tighten up the belts on this printer. Plus the bed itself being only secure from the back wobbles in the front-end anyway.. Damn terrible printer designs of these things all are :roll:

EDIT:

Seems the X-motor was actually loose :roll:

Quality is "better" but I am currently printing out a block to fit the Z-probe. So I do not really care how pretty it looks at this point.

My new magnetic bed and build plate arrived :dualthumbup:

Old glass bed.


Magnetic bed stuck on.


New build plate on.


New Z-probe mounting block.


Bed is now perfectly level. Though I just hooked the sensor up to my bench power supply. Thankfully it has a LED on top as a indicator. I have no idea how to hook this up to the board yet. But it probably will not be much use as there is no way to auto level the bed anyway :shrug:


So next up I need to work out how to manually do the Z-offset as I do not want to alter the bed manually again now it is level.