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Re: Borrowing an idea... Using a microscope's selectable lense mechanism for hot end changeover - 11 years ago

i just had the same idea and found this thread did you guys see this? i'm very interested in this since it (and maybe some other configurations for multi-hotend) would allow for a single calibration point, which from my experience is the only way multiextrussion can be properly done in a delta R

by faboratory - Let's design something! (I've got an idea ...)

Re: chinesse lasers - 11 years ago

nice blog! seeing the pictures that is exactly the kind of diode laser i've seen on aliexpress did you try to cut some stuff? it should be able to cut 3 mm of balsa or so... R

by faboratory - Laser Cutter Working Group

chinesse lasers - 11 years ago

hi! what about these ? there is a couple of laser diodes + driver, ranging from 100mw to the more interesting 1-2W range has anybody tried the performance of these chinesse lasers? thanks guys! R

by faboratory - Laser Cutter Working Group

Re: Shift in Z-axis - 11 years ago

ok! this seems to really be a faulty design by reprap discount i wonder whether they are aware about it check this answer

by faboratory - Repetier

Re: Shift in Z-axis - 11 years ago

yes i did. i narrowed the problem down the the "rumba vs ramps" issue. i guess the board is not as well designed as the ramps in some way. i think more people might be having this issue -if not every rumba user- but i think most of the people prints rather small objects so the problem is some times not noticed. at least that's for some people i know also it might be less -as in smaller displace

by faboratory - Repetier

Re: Shift in Z-axis - 11 years ago

hi! yes, i had a huge fan, and heatsinks its not diver related, sine i tested the same drivers on a ramps and rumba boards. with any rumba i had missing steps. i'm not totally sure it's always the y axis -since i have a delta paralel bot- but i think so i didn't try using an empty driver slot instead of the y-axis slot, and i will next week when i'm back home. then i will post the results here.

by faboratory - Repetier

Re: Shift in Z-axis - 11 years ago

hi! did you get any feedback from reprapdiscount? i think i have the same issue. the problem is i have a delta so it's not easy to debug wigh of the axis is missing steps. definitely though there is something going on with the rumba boards. i have tested on the same machine diferent rumbas and a ramps board. even swaping the drivers to make sure its not a driver problem. with rumbas the prints

by faboratory - Repetier