Denford Microrouter.

Last time it was faulty I did clean all the nuts but it was only when I fitted a new BOB that it stopped knocking and losing steps.

I have just been over to the workshop and regarding the velocity and acceleration settings X and Y were set at 3000 and 150. When first turned on (lo and behold) the machine jogged several times along X with no knocking. Set them to V=1000 and A=50 was knocking when jogged, Also tried 500 and 20 still knocking.