Dynamixel backlash

[HyperCube]

Does anyone know which dynamixels have the least backlash?

I'm considering upgrading axis 1 of a manipulator, it's currently an AX-18F which doesn't have quite enough torque. I have an EX-106 I could use, but it has some pretty hardcore backlash. I really need the positioning to be accurate (0.3º resolution is OK, but something like 0.1º would be better). The arm has both TTL and 485 buses running to it so it can use either bus.

Do the RX-64's have just as much backlash as the EX-106's? The new MX-28's look promising with a resolution of 0.088º. If these have very little backlash this would be perfect...

[HyperCube]

I just noticed that some of the bolts in the EX-106's were slightly loose, which was contributing to some (but not all) of the play. What a rookie mistake, lol! I think the remaining cause of play in the servos is backlash, without opening them up tho it's hard to tell.

I'll be really keen to hear about how much play there is in the latest line of Dynamixels, I guess people haven't had much of a tinker with them just yet to let me know.

I hope my post above hasn't scared anyone off from buying high-end Dynamixels. Overall, these servos really are something special.

[Th232]

I'm unsure which of the Dynamixels has got the least backlash, but would it be possible to get a weak torsion spring and lightly pre-load the joint?

[cire]

Did you adjust the settings on the servo at all? You may be able to reduce 'backlash' by changing the settings.