Talk:Prusa Mendel

BOM

Is the BOM primarily documented here or on github? We should not double document this and have the documentations inveitably fall out of synch. Either the git BOM should be deleted and replaced by a link to the wiki or vise versa, but having both can only lead to confusion IMHO. --TheOtherRob 16:13, 28 October 2010 (UTC)

The BOM is primarily documented here, until completed. Then it will move to the git. The picture was re-inserted to provide a link to the bigger version, this is not possible with the side-block, or do you know the way?. --Sikko 29 October 2010

Good point, I made the image clickable for all developments now.. not really sure why I didn't do that in the first place but it's fixed now. If the BOM is here can a placeholder be put in the github text linking to this location. That way people don't get confused by an out of date BOM at github. --TheOtherRob 18:09, 1 November 2010 (UTC)

Front-Rods.png shows a nut in between the y-motor bracket and the 608 bearing. However, in y-rods.png it is removed. I built up the whole frame before realizing my stepper shaft was too short to line up the gear and the bearing when the nut is there. Which version is correct? --Projoe 2010/01/24 11:36 EST

Z axis motors

Prusa has his motors running in parallel on the controller. This is causing me concerns especially if your motors require a fair bit of power. Since they are being ran in parallel, that doubles the current required and causes the motor drivers to run closer to their maximum current output. I was wondering if the coils were connected in series, would it run better since all that is require is a higher voltage and the normal power running to the drivers is 12 or more volts which would be fine running 5v motors. Series would also require as much current as a single motor so since the motor drivers work by restricting the current, it would give more torque since you can now put more wattage through the motors. (e.g. the motor driver has a maximum of 2 amps driving current and you have 2 motors that require 1.5 A at 5V. Since the supply powering the motors is 12v, instead of supplying 5v at 2 amps (which is less than the 3 amps required) in parallel, have them in series driving them at 10 v at 1.5 amps.)