Printing speed not the same

Snapmaker J1/J1s
1

Hi ,

I have a ‘problem’, when printing something with straight lines like a box the printing speed is like I want it to be 150 mm/s and the printing time given by the slicer is ±correct but when I print something that is more advance/ more detailed like a miniature for instance it does not go so fast it keeps going on 15mm/s witch of course makes printing time add up and it takes longer then my slicer tells me.

Example: https://www.printables.com/model/342049-gnome-supportless this when made 150% and sliced gives me a printing time of 2hours and i know this will eventually take 3time more the time 6 to 8 hours to print.

Is this a slicing problem or is it something the printer is holding back to?

(slicing software used is cura)

2

As there are only very short distances here, the printer cannot build up the speed. It has to slow down again before it can accelerate properly.

3

Possible but not the main reason I think. When I use my other printer (delta printer FL-sun Super racer) it does not hold back and keeps printing at same speeds–> speed I want.

4

the super racer is a delta printer capable of much faster acceleration which allows it to maintain speeds the way you want. the Snapmaker J1 can only accelerate at 10,000 mm/s^2. You can try to increase the accelerations in the speed settings of your slicer.

5

It has been a while but I finally found out what the ‘problem’ is.

In ‘Cura’ there is a setting called: ‘minimum layer time’ and ‘minimum speed’.

Layer time is standard on 5sec en speed 10mm/s.

I’ve noticed that when doing the calibration : ‘vibration compensation’ (ia input schape, i think) the speeds where more than the printing speeds that I have, even when using the same model (draw this model to be able to print it)
When I printed this model my print slowed down to 43mm/s… while when doing the calibration this speeds was way more.

I started searching and the above setting caused the delay/ slower speeds.
Started testing and adjusted the minimum speed to 125 → now the print was flying and at the speeds I wanted…