I have updated the firmware from 1.20 to 1.21. Now the printer does not work anymore.
When I upload a print file, the bed and the extruder are heated, then the printer stops as if it is ready.
At Home All I get the error message G0 / G1: insufficient axes homed.

I use firmware version 1.17.
I have now downloaded the 6 files from version 1.21RC1.
How do I update now?

Thanks for the tip. I now have a first layer with lines only

Now I am still sitting with the quality of the last layer. I am using Simplify3D.
Which setting is important for the last layer.

https://www.dropbox.com/s/nlz3o4aouihosqz/20171228_151441.jpg?dl=0

https://www.dropbox.com/s/oj2qcm1z79z8deh/20171226_125259.jpg?dl=0

This is an image of the first print layer.
Should the lines not be straight?
What could be the cause?

How can I place an image in the message

I have Nema stepper motors type
Lengte: 47 mm
Voltage: 3,3 V
Houdkoppel: 5 kg-cm
As diameter: 5 mm
Stap hoek: 1,8 °
Gewicht: 360 g
Type: SL42S247A
Nominale stroom: 2,5 A

What is the best setting for these motors

microstepping ?
mA ?

It is a private construction printer with a 300x 300 print bed.
Thanks for the tip. I will look forward to it soon.

Do these links work?

https://www.dropbox.com/s/tu53bvme6i3knxz/calibratie.JPG?dl=0

I'm using the IR Probe. If I get G32 out of the box then I get the following image.

https://www.dropbox.com/preview/Public/calibratie.JPG?role=personal

How I adjust the bed, the red dot I will not get away.

Meaning that the bed is not flat.

If the printhead moves over the print, the nozzle touches the print (see illustration)
I use Simplify3D and DuetWifi with cartesain printer.
How can I fix that?

https://www.dropbox.com/sh/gptnp7a2knc0bcb/AAAkWowT34SfJt7hfhypn62Pa?dl=0&preview=printvoorbeeld.JPG