Hello,

This is my first post but I can't find a similar problem anywhere else so I think it's worth asking!

I recently bought a Creality Ender 3 Pro. I printed a calibration cube and I went into the motion settings and tweaked some max/min settings etc. I also adjusted my step/mm settings. The next calibration cube was fantastic.

When I was done I shut it down and turned it on the next day. All of the settings I had tweaked had gone back to default. I was worried I would have to calculate my steps/mm again but before I changed any of the settings I printed the same calibration cube. It came out bang on.

I keep adjusting the Vxy-jerk to 30, vmax x and y to 550, and vmax e to 30 whenever I use the machine. I haven't had to work with the steps/mm again though.

Why does it keep going back to defaults? And why would my steps/mm be correct if it keeps putting it back to 80?

Thanks!