Buoyancy Engine Lubrication

[mpustie]

With a fresh battery, our buoyancy engine takes 21 s for the servo to reach the end of the buoyancy cylinder in order to empty all the water. So the "riseDriveTime" variable is set to 21 seconds.
Is this too long? When should the drive shaft of the buoyancy engine be lubricated? Is it a simple matter of reversing the build instructions to relubricate the shaft?
Thanks!

[David Young]

With a fresh battery, our buoyancy engine takes 21 s for the servo to reach the end of the buoyancy cylinder in order to empty all the water. So the "riseDriveTime" variable is set to 21 seconds.
Is this too long? When should the drive shaft of the buoyancy engine be lubricated? Is it a simple matter of reversing the build instructions to relubricate the shaft?
Thanks!

On SeaGlides that I have, it takes about 15 to 16 seconds on a fresh battery and 20 - 22 seconds on a drained battery.
To lubricate the drive shaft you can remove the 4 screws holding the servo mount on the syringe and lubricate the shaft.
The syringe seal may have lost it's lubricant if it was touched during assembly or after extended use. Unfortunately the syringe manufactures do not share what lubricant is used so it would be a guessing game unless someone else on the forum has recommendations.