Print Speed

I have signed up with 3D Crowd here in the UK to print frames for Prusa RC3 face shields in PETG (which is currently in the post).
When I slice the parts I get a print time of about 4 hours but other people in the 3D Crowd group are stating print times of about 1 hour!

Can anybody give me some advice on how fast I can make my Dibond Mendel90 print without causing it damage or degrading the print quaility too much? I have attached a screen dump of my current settings.

You mean like [www.youtube.com]

That is useful but I really want to know how fast I can drive the Mendel90 stepper motors before they loose steps, burn out or the frame starts to flex with the direction changes.

Edited 1 time(s). Last edit at 04/06/2020 06:52AM by Bearded Flyer.