Quote Originally Posted by uncle_bob View Post
Hi

If you look at the basic engineering of the Titan with it's wimpy motor compared to the basic engineering of the higher torque motor on the "simple" direct drive extruder, the direct drive wins. It also wins when you have a filament race and see which one will actually push filament onto a print faster.

Note, this *is* sort of a dumb comparison. Running at a speed that you exhaust the extruder with normal filaments means running a *very* fast speed on the printer. That will result in sub par prints. If that does not bother you, fine. If you are running something really weird, there are enough variables there to write a book on....

Bob
The key when using the Titan is selecting a pancake motor that has sufficient Torque. Looking at the specifications of the default Nema 17's they have about 54 Newton Centimeters, of holding torque. With the 3:1 gearing ratio of the Titan you should be able to select a stepper with 1/3 of the Holding Torque of the original motor. However, I am selecting something with 1/2 of the holding torque in order to ensure I have more torque than the direct drive.

Doing this, means I will be using a motor with a length of 34mm compared to 48mm.