MK3 210mm Z axis vs MK2.5 200mm
I have a MK 2.5 and noted that although both my MK 2.5 and the MK 3 use the same motor/screw/rod size, the MK 3 has a stated print size of 250mm x 210mm x 210mm (z axis) while my MK 2.5 has a print size of 250mm x 210mm x 200mm (Z axis). How does the MK 3 get an extra 10 mm of Z axis printing?
RE: MK3 210mm Z axis vs MK2.5 200mm
I don't have a MK2.5, but my guess would be either (or combination of):
- Different distance from nozzle tip to x-axis carriage in MK2.5 and MK3 extruder assemblies.
- Lack of limit switches on MK3 allows slightly more travel vs MK2.5.
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: MK3 210mm Z axis vs MK2.5 200mm
My MK2.5 is limited by the distance between print bed and the top mounts of the Z Axis screws/rods. Not sure how I could get 10mm from the extruder size/distance of print tip from bed. I have done all the upgrades to my 2.5 and they seems to give me the same size extruder. May be a difference in the distance of the bed from the bottom frame thus giving me more room for the X frame to go lower on the screws. I thought someone from PRUSA could say why and if a change to the 2.5 could gain the extra 10mm. Not that it is a lot of gain. Would like to see a bigger bed. A 250x250 does not seem to be too hard but the PRUSA frame would not allow a wider bed. The BEAR Upgrade could be modified to go wider and longer (they already have the ability to use a 450mm Z axis). All takes changes to Firmware. Maybe something in the future.
Looks like for now PRUSA has decided to go smaller.