Thanks! :)

Hi Kerem, thanks! (and sorry for the late reply) I'm using OpenSCAD pragmatically, from my background as a software developer, with virtually no background in CAD. I doubt its "best practice" what I'm doing ;-). I hope the source code can be used by like-minded people, I invested a lot in quite thoroughly commenting it. I like to believe that such source-code is the "language" in which we developer learn. github.com/markmaker/PushPullFeeder

Thanks!

Thanks! Sorry for the late reply.I thought I'd get notified by KZfaq? There is some info here: makr.zone/tag/build/ For specific questions, better ask in the comments there, or use e-mail. _Mark

Thanks! The possibility to cope without motors and elctronics etc. is the heart and soul of this project, the lever and ratchet the very core of the design. It wouldn't make sense to put a motor on top ;-) I think there are better designs for that. Look here, under "Feeders": openpnp.org/hardware/ _Mark

Sorry for the delay (somehow the notification stuff does not work). I don't think PLA will work, PETG is so much tougher and more elastic (for the springs).

Such questions are best asked in our discussion group, KZfaq comments are too limited. groups.google.com/group/openpnp

There is a design principle, that the smaller/removable part has the play applied. So you only need to reprint the smaller/removable part when the play is not right. Still, I would not print multiple bodies before having tested everything together in one test feeder. Also test the fit (the squeeze) on the extrusion mount, which is in the body, of course. This feeder is optimized to work without any external (metal) parts. The downside is that everything must really fit together nicely, not too hard and not too loose. Once you figured it out, document everything and then go ahead and print a whole series. The idea is to invest a bit of time tuning up front, but then have a very, very cheap and easy to assemble feeder that you can multiply. As to the makr.zone comments not working, I'll have a look. You can also use my email which is on the site.

Can you please ask the same question on the discussion list? You could perhaps send a photo of where you want to mount it. groups.google.com/group/openpnp

Thanks! > extra clip Ahh, somebody paid attention ;-) The feeder is designed so you can add reels of the full EIA specification width. I don't know if such monster reels exist at all today. But if you happen to have these, they fill up all the space and you can't then add the green holder on this side of the reel. Instead, use the clip to fasten the cover tape spool. The Reel will then only stay on the axle, if it is in a row with others. Well, that would then probably be a bit dodgy... but I wanted to fulfill the spec ;-) _Mark

First, please be aware of the use case, this is for hobby/ultra small scale prototyping. The feeder is intended to spend its life with the reel, i.e. there will be no reel change, it is so cheap you can print one for each reel. I expect my reels to last forever, because I will only use a few hundred parts of each in the course of my hobby and I think many people have the same use case ;-) I discussed this here in the OpenPnP group: groups.google.com/g/openpnp/c/VDEKlvYKfTY/m/NOwMW3xWAQAJ: Secondly, it is important to note that the mechanical holding force comes from the "squeeze" when you rotate the feeder onto the extrusion, not from the lock. This extrusion cutout is quite a sturdy piece of the model. The lock only holds that squeeze-rotation in place, i.e. ~90° to the actual forces, so only a small fraction of the load is on the lock (if that makes sense ;-) _Mark

It does not work that way. The model is parametric. Best watch the entire video, especially the part about the test prints. You'll need to download OpenSCAD, but don't worry, you just enter Parameters in the easy to use Customizer GUI, no need to really have any OpenSCAD skills.

@@markmaker4345 Yeah but that is a whole new learning curve. I am just looking for examples to edit. Thx for the reply.

Best follow the discussion in the OpenPnp group. There was someone doing 16mm and 24mm feeders with success. groups.google.com/forum/#!msg/openpnp/VDEKlvYKfTY/s8DyI60KBwAJ _Mark

@@markmaker4345 thank you for your reponse but I was speaking about the diameter growing when you have a lot of plastic on the spool. Are there differences between when you start and when your reel is almost empty ?

As I understand it you rewind the plastic film which makes the tape advance but since the diameter of the reel that winds the plastic changes as you use it, this should have an influence on the progress of the band that is no longer regular. Is that the case ?

@@JuPrgn Ah, ok I misunderstood. I'm afraid I can't say. Never used up a reel. The cover tape is just gobbled up, it does not pull the tape, so I'm not that concerned. And the spool can be very quickly emptied. Just pull off the cover, or simply unspool. The C shaped clamp makes it real easy and fast to reattach the new lead. _Mark

@@JuPrgn > rewind the plastic film which makes the tape advance No, the tape is advanced by that thing that looks like a dog, that Dmitry invented AFAIK. The spool just takes the slack in the cover tape. _Mark

Thanks! Only the small and fast to print Tape Inset needs to be reprinted to adapt a different tape. See at 4:40 in the video where the tape is inserted. In OpenSCAD use the Customizer (right side pane) and there the Tape Specification section to adjust tape thickness etc. "Sixagonal shaft"? I don't understand. For better discussion, go to the OpenPnP discussion group at groups.google.com/g/openpnp.

thank you@@markmaker4345