tag:blogger.com,1999:blog-4339813531032979196.post6858401108441680317..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: RepRapped Shaft Encodernopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-4339813531032979196.post-41063458010863578712008-12-07T21:20:00.000+00:002008-12-07T21:20:00.000+00:00I think they are similar resolution but a lot smal...I think they are similar resolution but a lot smaller. Fine if you have an old mouse but we don't want a self replicating machine to rely on hard to get parts. The whole point of this design is that the machine can make it, bar the optos, which are cheap and readily available.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-39165413947785862612008-12-07T20:34:00.000+00:002008-12-07T20:34:00.000+00:00What about just using an old ball mouse's mechanic...What about just using an old ball mouse's mechanics. Those were pretty fine and should give excellent alignment, particularly if you use the original parts to position the PCB relative to the wheels.Anonymoushttps://www.blogger.com/profile/06564216795012231141noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-17180509160535349502008-09-11T00:15:00.000+01:002008-09-11T00:15:00.000+01:00They were reclaimed from old equipment so I don't ...They were reclaimed from old equipment so I don't have a spec, but the ones used by RepRap should work fine. They are pretty similar to the ZD1901 that Vik uses but I would recommend the H21LOI with built in Schmitt trigger.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-30507082000730393502008-09-10T16:31:00.000+01:002008-09-10T16:31:00.000+01:00What sort of opto did you use? Do you happen to ha...What sort of opto did you use? Do you happen to have the model number or a link to the data sheet?<BR/><BR/>Thanks!briblahttps://www.blogger.com/profile/18426590015619637809noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-5354790667496058242008-08-16T15:24:00.000+01:002008-08-16T15:24:00.000+01:00I wonder if FR4 is IR translucent enough to be abl...I wonder if FR4 is IR translucent enough to be able to make a wheel and opto apertures with PCB techniques.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-57642409488570362322008-08-16T13:49:00.000+01:002008-08-16T13:49:00.000+01:00I was thinking of laser printing onto film and t...I was thinking of laser printing onto film and then sticking it onto a smaller RP wheel to support it. I am guessing film is IR transparent and toner IR opaque.<BR/><BR/>We could also make small aperture optos by sticking film with a pair of slits printed on it over an RP plastic block with holes for the receivers.<BR/><BR/>If we achieved 0.5mm resolution on a 40mm wheel it would give us about 500 steps.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-82096992027508282402008-08-16T13:37:00.000+01:002008-08-16T13:37:00.000+01:00On the slotted opto disk.This looks on the face of...On the slotted opto disk.<BR/><BR/>This looks on the face of it to be an ideal candidate for saltwater etching one out of thin brass or copper shim/sheet. But only where high resolution is required. Vik has a point with the Z Axis.<BR/><BR/>http://www.instructables.com/id/The-Saltwater-etch-process/<BR/><BR/>Is a note on doing printed circuit boards this way.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-21979800157083194942008-08-16T13:30:00.000+01:002008-08-16T13:30:00.000+01:00The 3-3.5mm welding filament is a bitch.You may be...The 3-3.5mm welding filament is a bitch.<BR/><BR/>You may be able to reprocess it using a pair of heated (Hot air) alumimium wheels with semicirular grooves cut in them followed by another pair cooled/cold to set the new dimension.<BR/><BR/>I was thinking of a roller/wheels possibly turned on your lathe each wheel having a semicircular groove of 3mm diameter cut in them. <BR/><BR/>Putting a pair of these rims together will make a rolling orrifice of 3mm.<BR/><BR/>You may not actually need a second cold pair.<BR/><BR/>Thoughts for what they are worth.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-34209356102125296022008-08-14T01:41:00.000+01:002008-08-14T01:41:00.000+01:00Just to point out that phenomenal accuracy is not ...Just to point out that phenomenal accuracy is not required for the Z axis, so that's a prime candidate for receiving this design.<BR/><BR/>Vik :v)vik-olliverhttps://www.blogger.com/profile/14574212494833831824noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-2800240789914434062008-08-13T21:01:00.000+01:002008-08-13T21:01:00.000+01:00Nophead, I have an idea for increasing encoder acc...Nophead, I have an idea for increasing encoder accuracy, but there are commercial considerations. Please email me at albionth@hotmail.com, we'll discuss this further. (I haven't stripped any printers yet, probably at the weekend.)TheTrevorhttps://www.blogger.com/profile/04059325240676144569noreply@blogger.com