I upgrading my printer (is called the g&c printer), i replacing all x, y and z axis with better ones. The x and y axis are almost ready. Posting some photos of the corexy movement to get some critics on my desing.
Some specifications:
3 x 15mm linear rail hiwin
5mm laser cut aluminium main plate
Use only one belt of 4 meter instead of 2.
Belt tension made on the motor support.
Both planes are on the same level, using a twiste on front. The belt do not touch because two bigger pulley are not on the same z level.
Only use printed piece to secure the belt on the carriage.
The carriage was made using 2 motor mount brought on ebay.
This ia about the same i want to do in terms of conversion of my corexy setup. http://www.thingiverse.com/thing:313095 i would reverse the motor pulley on the z axis to enable you to setup astrosyn motor dampeners. The are cheap and remove so much vibration. You could add the below the plate easily.
@Jean-Francois_Talbot my printer was dampers on boths x, y and z motors and i want to remove all the dampers. The reason for this is because i using 1/128 steppers that give a lot less vibrations and dampers introduce tensions variations on the belt.
Nice design! My only very slight suggestion would be that you could move the y rails in to the innermost edge and the belts out to theoretically have the best case scenario to avoid racking. But I doubt it will be a problem. Good job!
@Brook_Drumm about the y axis, the y rails are outside because that was the only way i found to get the most possible print lenght on the y axis. This core machanism will go on the on a actual working printer that was 40cm by 40 cm of size. The plate was 46cm on the y and it will allow me to have a 31cm x 29cm. Because is a upgrade i doing and not a new printer there was lot of retrictions, if i was build a new one i will no doubt have done like you say.
My big concern about this upgrade is the bed. I upgrading a bed from 20x20cm to 31 x 29 and using only 2 rods and one motor using a cantiveled sistem. The atual bed use 2 x 12mm rods, 8mm lead screw with 2mm pitch and all metal structure. It will be upgraded with 2 x 16mm rods, 8 mm lead screw with 1,5 pitch. But not sure it the nema17 motor will have enough torque to move everything correctly.
