Originally Posted by
RPS68
If I assumed that the thrust bearings are in perfect condition and of high grade like P4 or p5. I can definitely eliminate this, but however the bearings when pulled out of the assembly and gave it a wash, there seem to be contaminated with metal shaving I picked metal shaving with a magnet from the bottom of washing container.
The metal shaving could be from contaminated grease or thrust bearing has been over tighten. I am expecting new bearings, I will give the new bearings a wash and see whether any metal shaving exist in new bearings. If it is good bearings I should be able to eliminate the thrust bearings.
The backlash is little better if the gibb is loosen fully.
I tried to detect backlash from thrust bearings by DTI the end of lead screw then give it a
good push and pull with gibb fully loosened , the movement causes the lead screw to rotate so this method is out.
(Zetopan) Yes I have checked the coupling. I broke the ball of 4mm allen key.
It is a challenge to detect where the backlash come from as flex is also some where in the equation.