So it looks like the fan has done its job at cooling the hotend. But as you can see there is some serious (what looks like) z banding towards the top section. Now I was installing solidworks in the background during the second half and my computer was very slow even after the print was finished (solidworks was still installing). The bottom portion looks good but it’s the top where I had issues. Could it just have been from solidworks causing problems?
Key information required for an answer:
printer ?
Settings for print ?
Operating system ?
Is it a problem never experienced before ?
Host ?
Printer: Smartrap reprap
Parameters: 30mm/s 2 shells with 35% infill and a 1mm top and bottom thickness.
Software: Pronterface (slicer in Cura)
Printer firmware is marlin
The issue has not occurred before but I just added the fan. I have printed stuff this high but never this exact part.
i noticed that same thing when I was using my little laptop to print, if i did anything else the printer would slow down (even stop) as if it had run out of cpu time. a little worry some but it finished, use a dedicated older PC to run the printer and leave it to do solely that
@Matteo_Pascolini I have a lcd coming in tomorrow so I don’t intend to print off of my laptop anymore. It’s 4 years old and is slow. So I think that was probably the issue
Sure you don’t have any oscillation in your bed temp? The bed will (in most cases) raise/lower slightly as it heats/cools. It’s quite easy to overshoot the temp, especially if your bed is putting out way more power than it needs to stay close to temp (eg: caused by running it at a higher voltage, etc). The fact that you’ve added a fan to the hot end may actually exacerbate the issue, by actively cooling the bed (particularly where the bed temp sensor is), leading to a larger hysteresis as the bed heater tries to compensate.
Do you have some sort of nozzle on the fan to direct the airflow?