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Printing with PLA

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webby2:
I bought a new printer
https://www.amazon.com/TRONXY-Semi-Assembled-Filament-Adjustable-Eccentric/dp/B079LYSQCP/ref=asc_df_B079LYSQCP/?tag=hyprod-20&linkCode=df0&hvadid=241942224913&hvpos=1o1&hvnetw=g&hvrand=3997737725117473230&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9033255&hvtargid=pla-707605623047&psc=1
but mine does not have the filament detector.

This was really easy to assemble and does a fairly good job.
HOWEVER
I found out the hard way that you need to adjust the Z stop when the bed is hot.
The paper drag setting also needs to be so that you just start to feel a little roughness when pulling\pushing the paper under the nozzle.  I am assuming that the printer firmware has a Z gap built into it,, I have not looked at the firmware settings that it is shipped with.
If you set the Z stop to close to the bed not only do you get a really bad elephant foot thing but it will fuse the filament to the magnetic build sheet, thus leaving huge holes in the build sheet.

I am using Kiss slicer software and Pronterface to print directly from my computer, the small card that comes with the printer can also be used if you do not want to have your computer doing the printing server thing.

My other printer, which is a modified RepRap Guru Prusa i3, I am using a Raspberry PI as the print server running with Repetier-server free print server.

webby2:
one thing to mention with these printers about hole size,,

It would be suggested that you print several slightly larger or smaller holes to get what the error is for the printer,, like mine is 4.15mm Radius for an 8mm hole, this leaves just a little snug where as 4mm radius is to small for an 8mm shaft.

webby2:
Here is my new Tronxy in action.
This is the largest single print I have ever done :)    I put the ruler on the bed to show its size

I was having some issues with lifting and stuff,, so I used denatured alcohol to clean the surface and then used some 120 grit sandpaper to sand the entire surface and then clean again with the alcohol.  I also raised the bed temp to 70C instead of 60, the heater element does not go all the way to the edges of the print surface and so the edges of the bed were cooling down to far to hold the print in place.

I also was having print issues that were strange, I would get a shifted print, meaning the print would go for so many layers and then it would suddenly shift in either the X or Y plane and continue.  At first I thought it might be because I was using my computer to serve the print file but I noticed a strange sound every now and then coming from the printer,,,  It was the spool holder position and filament angle of entry into the extruder.  When the spool was on the top of the frame the filament was trying to make a 90 degree turn into the extruder and that port is threaded,, also the spool holder was basically a flat piece of metal that did not allow the spool to roll nicely and what would happen is that every now and then the spool would bind on the holder, that would put to much tension in the filament and that would pull the filament up and into the threads of the port going into the extruder and all of this was just enough to cause the belt to slip a little bit and change the print.
I made a spool holder and it now sits off of the printer and to the side and things are doing way better :)

webby2:
Interesting thing with the Tronxy,,

To print that large print the bed was not holding enough heat out at the far ends to stop the print from warping and lifting,, so I took the suggested setting of 60C and upped it to 70C, this then kept the print stuck to the build surface,, great right ???

Nope,, I have been having fairly good prints off of this thing, they are within about 0.15mm until I upped the bed temp.  At the higher temp the error was up to about 0.3mm but more interesting is that the whole print job was messed up differently,, it was a size thing but the smaller the hole the bigger the impact, the larger the less,, dropped the bed back down to 60C and it seems as tho the issue is not there.
I also have to power cycle the printer from time to time, I start to get a growing error in the Z axis until I power cycle it,, funny little things that to me point to a power supply issue.

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