Ultimaker 2 - Strange noise on z-axis during slow movement

[3DSKULT 1]

ULTIMAKER 2 SCHEMATIC - click "raw":

https://github.com/Ultimaker/Ultimaker2/blob/master/1091_Main_board_v2.1.1_%28x1%29/Main%20Board%20V2.1.1.pdf

 

 

Thanks gr5 I saw this but in fact this is not the only step. step per unit has to be changed into the firmware + the Z offset calibration need to be clear otherwise it will bump the header of the UM2

[3DSKULT 1]

ULTIMAKER 2 SCHEMATIC - click "raw":

https://github.com/Ultimaker/Ultimaker2/blob/master/1091_Main_board_v2.1.1_%28x1%29/Main%20Board%20V2.1.1.pdf

 

 

Dear Gr5. Can you confirm that in order to change UM2 from 1/8 to 1/16 stepping, I just have to add a jumper on JP3 ?

Thanks

[gr5 2,334]

Yes, exactly. And changes steps/mm in the ulticontroller. Do you have an ulticontroller on your printer? If you double the steps to 16 microstepping then double the number in the steps/mm parameter. If you skip that step everything will be half as tall!

Make sure you save all the parameters to eeprom also or you will lose the steps/mm setting when you power cycle the printer.

[tinkergnome 929]

Do you have an ulticontroller on your printer?

 

We are talking about an UM2, don't we...? I somehow cannot bring together the two terms UM2 and Ulticontroller...

The UM2 firmware menu has no options for the steps/mm, but pronterface and M92 can do the job.

[gr5 2,334]

Oops - yes, good point tinkergnome.