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Brian Enos's Forums... Maku mozo!


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  1. I'm not using any sensors right now and relying on nowing the cases fall at a known speed, gravity. So they should all behave the same for the most part unless the odd one gets hung up for some reason such as debris or case deformation. That said I ran into a few issues with running things fast on the edge of maximum speed and a full tube of cases. I think it was related to the weight, or the position of the bailing wiring not getting enough force on the cases... I was having 2 cases drop at a time, I think there there wasn't enough friction between the bailing wire and the ca
  2. Thanks for the thoughts. I'm mixed on having the camera straight underneath or not, debris is definitely a concern. However, for the time being i'm going to keep things at an angle since i already have a mechanical prototype that seems to be working. And working probably faster than my case feeder can spit out brass. I spent a little time today cleaning up the code. My next block of free time will be spent hooking it up to my case feeder, and working on model training and classification. Pending no major issues i think a working prototype can be done with a couple more days w
  3. Sensors could be helpful, even a couple basic micro pressure switches would help with some of the guess work. Might be worth considering. However at the moment since i'm not sure a case feeder can even push cases fast enough unsure if it's necessary. Yeah i didn't explain the buffer issue well. I request Image from the webcam, but the buffer has an image that's 1/6th of a second old. So the case is ready and in position for it's close up, but the buffer on the webcam has an image from 1/6th of a second ago when the case was still falling making it appear that i took the shot ea
  4. Had a little time to work on image capture this afternoon. Was working on taking pictures and cycling brass. Since this is set up in myoffice right now while i work on the code i'm limited to testing 5 peices of brass at a time. at best speed after a lot of tuning I was able to capture images of 5 pc of brass in 2.1 seconds or about 2.4 pieces of a brass a second. I'm running into 2 issues. 1.) the brass can only move through the chute so fast and trying to tune the servo speed is guess work. 2.) NERD s#!t: there is a small buffer with the usb camera and ope
  5. I saw that, very cool. I have a almost a dozen 30 cal ammo cans full of pulled bullets, and I found a few doing random samples that are the wrong weight, 124 vs 115 or 147 for example. So now I intend to weight check every single one of them. Something similar to what you did will be my next gadget. My concern with using a piece of glass is that it's going to get snotty and obscure the image. Consistent lighting is also really important an another concern of mine is glass causing additional glare. Not to mention debris getting on the glass. I haven't tested the ima
  6. Thanks! My first time taking on anything like this and learning multiple skills as I go. I'll include a basic walk through of setting it up once i get it working. Once I get a working prototype, all the source code and cad files will be shared. Once i put it out there, anyone can do with it as they wish. Hopefully some will help to improve the design and provide feedback back to me. I'm more than happy to collaborate with others. I really have no idea what i'm doing, and there are plenty of people out there much smarter than me that probably have great ideas. To start though
  7. put a little work in on the sorting mechanism. Still not done. I ran it a little harder today and ran into a few small issues, Going to make a few dimensional tweaks and hope that they're sufficient, some of my tolerance are too tight for what my 3d printer can produce, and i'm not providing the motor shaft enough surface area to interface with the flappy door and the door popped off.. Here are 2 videos Showing how the flappy doors work putting in 3 pieces of brass, 1 to go left, one to go straight down,
  8. So right now this is all conceptual. I have some core components I've tried that worked on a bench as isolated trials. For Image capture, i'm using a usb web cam and the plan is to use opencv to capture a cropped image. I just need to pop over to the hardware store to grab a 1/4-20 machine screw to mount the camera so i can start capturing images. I have 2 ideas on how to do image classification right now. Train a neural net using the tensorflow python library use opencv to do a polar unwrap (ie, unwrap the text on the headstamp so it's in a straightish line) and th
  9. Worked around the issue of the servos going nuts and breaking all the mounts, still working on the timing, running it pretty slow right now for testing purposes. Right now the plan is to mount the gate at an angle to take the pics, then have a deflector to have the brass go straight down. I am concerned if the brass is going at an angle that things will run a little bit slower than if the brass was straight vertical. Taking pictures that aren't perpendicular to the brass probably won't be a huge issue, but i'll have to test it eventually
  10. One more update for today, this is the current iteration of assembly that interfaces with the case feeder, just finished the print and assembled it to take a pic, but i'm hesitant to run it until i fix the servo issue. Going to either use a converter to step up the logic signal to 5v or get new servos. Hoping that takes care of the issue. Made a few small changes from the last version of this i printed, but the last version worked on the bench until 2 of the servos went haywire and snapped their mounts. I was able to continuously feed brass into it, and have it spit it out 1 pei
  11. I think i figured out my random servo movement issue. Servos i'm using need 5V logic, but the controller i'm using outputs 3.3V logic. Going to order new servos that use 3.3V logic input. I changed the design of assembly that interfaces with the casefeeder. The entire assembly will be caliber specific instead of trying to make it universal. Right now the focus is 9mm, since i have buckets full of it. This is easier for now to design and get to a prototype i'm ready to share, eventually i'll try to do something more universal, i have a couple ideas. I also had too
  12. Made very little progress this weekend, got everything assembled, mounted and starting to try and figure out the timing of the brass control. I didn't get very far, but i was able to get it to control the flow of brass, just not very well. I was also getting some unpredictable behavior from the servos that I have to look into. At times they would just randomly rotate to extreme angles and destroy the bailing wire i was using. Unfortunately I spent most of the weekend with one of my cat's at the veterinary emergency hospital, still not sure what's going on with her.
  13. I haven't posted this anywhere else yet. Once i get a prototype working i'll make a post on arfcom and a few other popular places. I also need to come up with a name for it. Didn't make any progress this week, too busy with life, but going to put another day into it this weekend. My goal is to get the module that takes brass from the case feeder and presents it 1 by 1 to the camera timed properly. Get the camera mounted, and work on the code a bit for image capture and classification. I don't know, that's a good question, but i have
  14. apparently I can't screen shot, trying again Also i didn't answer your camera question. And endoscope could be a good idea, but right now i'm using a usbcam i got off amazon with a variable zoom lens and a manual focus that seems to work well. Trying to zoom in on that headstamp as much as possible and make sure it's crisp/clear.
  15. Yes, the wires/pins are moved by servos. The gates for the sorting mechanism are run off of cheap DC 130 style hobby motors. I'm not sure how the hobby motors will hold out long term since they need voltage applied to keep closed (closed means no brass is going out of the gate), aka they're stalling out and generating heat... Right now (v3) they only swing up to about 80 degrees so they want to fall open at rest (to divert brass into the output tube), so and need more voltage than i'd like (about 50% pwm) to keep them closed.. The next iteration of the sorting assembly will all
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