At the bottom of page 18 of GUIDE FOR BUILDING THE CLAWBOT, it says “High Speed Mode provides 60% faster rotational speed with a 60% reduction in torque.” This would mean the 393 only operates with 64% of the normal efficiency. At least one person has said he/she hasn’t experienced anywhere near this loss, and it doesn’t seem to fit with what others have said. So this sounds really wrong. When I look here VEX EDR Motors - VEX Robotics I don’t see anything resembling a 60% reduction in torque, either. I suspect this should read “High Speed Mode provides 60% faster rotational speed with a 38% reduction in torque.” Otherwise, the product page probably contains errors, but it seems to make more sense.
You’re absolutely correct. Thanks for pointing this out!
I’ve updated the link to the Clawbot build instructions to a new, correct version. It can be found here: