3D Printing Forum

Hi all, Have 2 Hictop dual extrusion printer. They have been printing simply beautiful prints until recently and have completely gone off the rails
Attached are pics of one of the great prints and the others are of what has been happening lately
Lays bottom layer and next 3-4 layers no problem, no adhesion problems, then they start either printing layers off skew or, and this now happens all the time, starts printing a horizontal line across the middle of the print (as per pic)
Has anybody got any ideas as to why this is happening and how I can fix it - PLEASE

Are you still using Stock firmware.

Yes I am

I can not wrap my head around what is happening.

Could we start an exchange of posts to see what could be causing this problem.

My Hictops 3DP11 and 3DP12 had erroneous stepper motor moves and decided to troubleshoot findings below.
My Hictops had crazy un-programmed moves that were made, unlike your Hictop it did not print filament.
The movements were in the X,Y and Z directions, I could guess that my printers problem could have caused an extrude.
The problem was traced to noise, and when I placed the LCD cables in a makeshift EFI conduit unintended moves stopped.

My conduit consisted of covering LCD ribbon cable with blue tape then covering Blue tape with aluminum Duct Tape and ground it.
First I make a 3D Printed case of my controller an lined the inside of case with aluminum Duct Tape, this proved effective,
but it required more shielding. I also moved the LCD displays to the Front frame rail for ease of use also helped stop unintended moves.


I re-routed all cables inside controller case the shortest direct path to the an exit portal with-out crossing the stepper motor drivers.


My Case Designed Attached, No fan mounting hole's were included holes need to be drilled for fan used.
I have many more posts to read on this forum, I have added many models to Hictop to improve its printing.
This includes changing to Marlin 1.x.x or Marlin 2,x,x firmware.

Awesome, it's amazing to see so many passionate hobbyist modding their own 3D printers and sharing their experience here on the forum