Hallo everyone!
As this is my first post here, I do a little introduction to my self:
Introduction (you can skip this, not necessary for the topic itself):
I am Albert, mechanical engineer from Germany and I recently (march 2017) got into 3D-printing. In the meanwhile it is my new and absolute passion....
As I originally didn't want to neither spend the time on building a DIY-printer nor to spend the money for the originally desired Ultimatiker I went for a FlashForge Finder
I love that little machine, as the print quality and usability (HQ touch screen, WiFi, TMC2100 drivers) is quite awesome for a quite cheap plug&play printer.
So I got four more of them, as I thought: 3D printing is slow, I want my CAD-designs printed as fast as possible and there is some money left in comparison to an Ultimaker
It was a good choice
Nevertheless it has it's issues:
- building space is artificially restricted (140x140x140mm...)
- no heated bed
The lack of a heated bed was the biggest problem for me, as the room/garage where they are working is not heated and there were temperatures below 15°C at that time.
Bed adhesion and warping (even with PLA :/) were my enemies.
So a friend of mine suggested to take one of my finders and upgrade it to 32bit smoothieware, as there was a MKS sbase v1.3 in his possession he didn't use at that time.
The aims: Integrate a heated bed (214x214mm MK3
and switch to bowden / E3D V6.
Said and done, not a big issue. Among other modifications and some CAD designing this was realized without severe problems.
Building space is expanded to about 190x150x150mm (there is potential for more, especially in Y- and Z- directions) and meanwhile even dual extrusion is integrated in this "FlashForge Finder Plug&Play-Beginner printer".
32bit and smoothie are really nice and quick to master, but meanwhile I have temperature reading problems and the integrated stepper drivers are cruel in comparison to the TMC2100 of the FF Finder.
That's why I opened this thread.
MKS sbase 1.3 thermistor problems
I have four of these boards from different sources (chinese-shop, shops in UK and Netherlands).
At the beginning they worked great.
But after some time using them (
abusing them? I had to connect and disconnect a lot and sometimes I forgot the 5V-USB power being still connected) , problems started to arise:
- one board is completely dead, no reaction to 12V or 5V (USB-) power - probably my fault... shouldn't be the topic here.
- board #2 and #3 have quite similar problems with temperature reading
- board #4 is new, no problems (yet)
Temperature / thermistor problems:
board #2:
Three of four thermistor connectors show temperatures of 929°C or 1044.2°C (switching) - doesn't matter if a thermistor is connected or not.
One of the connectors is still working like it should, so I use it to control a heated bed of one of the non-modified finders.
My skills and knowledge in electronics are quite low, so I can't explain for myself what is going wrong...
Screenshot of temperature readings:
board #3:
None of the thermistor connectors are working.
All of the thermistor connectors show temperatures of 202.3°C - doesn't matter if a thermistor is connected or not.
Screenshot of temperature readings:
My questions and I would be so thankful if there are answers to these:
(1) What can go wrong with temperature readings? What and how can this "break"? I don't want destroy more of those boards...
(2) Is there any possibility to repair this for myself? Hardware-like or software-like ("hard reset" or sth?)?
Thanks a lot to everyone!