Creality Ender 5 print nozzle hits infill

I have just started with 3d printing, done a couple of small items ok.
But with this bigger one with internal ribs I have a problem.
The print head is zooming to it's next print position and clashing with the ribs of the infill as it passes over and causing bad vibrations. Any idea what causing this.

Thanks Ken

Is it mainly with the first few layers? It could be the first layer not sticking properly, curling up so the next layer the nozzle bumps against it. This causes noise and sometimes layer shifts. Try printing slower for the first layer and or adjust the bed temperature and nozzle temp.

Also make sure the bed is clean, and has a good print surface like pva glue, kapton tape, hairspray, pei or buildtak etc. Try what works for you.

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Kind regards
Imqqmi

NFAN CoreXY printer:
[reprap.org]

Imqqmi

Thanks for the suggestions.
Using a layer of PVA glue 10 to 1 has sorted the problem. (I had 5 litres in the shed)
I also ticked the box for Z hop in Cura
Everything's great now
Thanks again.

Ken