Jwglista,
If the motor is moving because of a side-mounted on/off switch, which I agree is a poor design choice, try holding the motor down firmly with one hand while operating the switch with the other. Simple fixes for simple problems. :-)
If the motor *still* ends up touching the plinth despite this extra care, odds are the belt tension is pulling it there. A fix might involve any or all of:
- a less slippery surface beneath the motor feet
- less slippery motor feet
- lower tension on the belt
Each of these is likely to have audible effects too, but you must do something to prevent motor vibrations from transferring directly to the plinth and thence into the tonearm and cartridge. That's a guarantee of sonic mud and an excessively high sound floor.
As Manitunc stated, few if any vinyl rigs are set-and-forget devices. Their "convenience" resides mostly in a ready response to incessant tweaking!
Good luck and keep at it!
If the motor is moving because of a side-mounted on/off switch, which I agree is a poor design choice, try holding the motor down firmly with one hand while operating the switch with the other. Simple fixes for simple problems. :-)
If the motor *still* ends up touching the plinth despite this extra care, odds are the belt tension is pulling it there. A fix might involve any or all of:
- a less slippery surface beneath the motor feet
- less slippery motor feet
- lower tension on the belt
Each of these is likely to have audible effects too, but you must do something to prevent motor vibrations from transferring directly to the plinth and thence into the tonearm and cartridge. That's a guarantee of sonic mud and an excessively high sound floor.
As Manitunc stated, few if any vinyl rigs are set-and-forget devices. Their "convenience" resides mostly in a ready response to incessant tweaking!
Good luck and keep at it!

