Quote:
Originally Posted by ChrisV
I don't have a Skywatcher. If it's happening regularly what does that period relate to - one rotation of the worm shaft, stepper motor, etc.
rotating the steppers manually should feel like even clicks. If not that, can you disengage the steppers and manually turn the worm shaft - it should feel smooth while turning.
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I’ve owned a HEQ5, one worm cycle is 9.6mins
IMO a regular short period 12arc sec spike is either intermittent spurious data drop out during a guide pulse cycle or physical damage to the worm gear or main gear on the Ra and Dec.
My hunch is the latter due to the scope hitting the mount and grinding
You couldn’t visually see damage to gearing causing a 12arc sec spike ( it’s microns )
It’s a tough one to find.