Another clunk in the dark last night followed by another every
4.5mins....(the worm period)!
Last night the worm gear had returned to the spot where the
problem had been where I had the toothed belt jump a tooth.
I had marked the section with red pen just in case.
Seems like there is a high spot still that has been exposed
once again by a change in mesh.
Thought it was fixed.
I will pull it all down again but this time I might try the
'paper between the mesh' method I have read in Peter's
Hypertune thread.
This will almost certainly introduce some backlash and need
a new PEC curve generated. I have had almost nil backlash with
this setup, the drive starts following stars immediately at 1524mm FL.
I'm reluctant to introduce backlash but if it removes a high spot and
protects the worm gear so be it.....
Steve