Why does my Z hop sound like a hammer.

[Karim]

How can I quiet down my printer Z hop, This is Voron 2.4 3d Printer, <4> Z belts.

; Drive directions
M569 P0 S0 ; A      
M569 P1 S0 ; B
M569 P3 S1 ; Extruder
M569 P5 S0 ; Z1
M569 P6 S1 ; Z2
M569 P7 S0 ; Z3
M569 P8 S1 ; Z4


M584 X0 Y1 Z5:6:7:8 E3                            ; Motor mapping and steps per mm
M350 X16 Y16 Z16 E16 I1                           ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E562.00                 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00               ; set maximum instantaneous speed changes (mm/min)
M203 X60000.00 Y60000.00 Z18000.00 E1200.00       ; set maximum speeds (mm/min)
M201 X6000.00 Y6000.00 Z4000.00 E250.00           ; set accelerations (mm/s^2)

; Drive currents
M906 X1500 Y1500 Z1200 E400 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

[Phaedrux]

Try reducing the acceleration.

[Karim]

@Phaedrux on Z like this

M201 X6000.00 Y6000.00 Z4000.00 E250.00           ; set accelerations (mm/s^2)


M201 X6000.00 Y6000.00 Z1000.00 E250.00           ; set accelerations (mm/s^2)```

[Phaedrux]

That's a good start.

[o_lampe]

@Phaedrux
I still wouldn't recommend using Z-hop on a moving bed printer. There are so many possible side effects when moving a big mass.
I'd switch it off after the first layer. That's where it is most critical not to scrape the nozzle over the fresh print.

[dc42]

@Karim how much Z hop are you using?

[Karim]

@dc42 I am using Prusaslicer 2.5 and this is the only setting I see Z Lift. This printer the Bed is fix and the Nozzle move up and down (Corexy).

[dc42]

@Karim that looks reasonable, although you could try using less. I typically use one layer height.

[Karim]

@dc42 I am using .6 Nozzle and print @.3 layer height. So what else can I check.

[Phaedrux]

Did changing the acceleration help?

Do you have the tension of the Z belt gear reduction set correctly?

[Karim]

@Phaedrux lowered Z speed. Sounds better now.
Thanks.