C8Myotome Posted August 10 Share Posted August 10 Replicates CPW ratings 11 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted August 10 Share Posted August 10 That’s really pretty cool Nice work 1 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 18 Author Share Posted September 18 (edited) I installed an antirotation device and finally put together a video going over my setup. Edited September 18 by C8Myotome 5 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted September 18 Share Posted September 18 Nice set up great video 1 Quote Link to comment Share on other sites More sharing options...
marko Posted September 19 Share Posted September 19 (edited) I’ve completed a version using what I had on hand, including an AASS RGC device. Thanks for the inspiration! Using a chain hoist (since winches were sold out), I’m averaging a tolerance of .006, but with nylon webbing and environmental factors, I’ve seen accuracy down to .003. I 3D-printed a strap holder to keep the strap in the same spot on the handle and splay it below the handles to prevent rubbing. I also 3D-printed a shim to keep the gripper firmly in place, maintaining parallel alignment. I’ve tested different pulley types, positions, webbing knots, and materials, and the setup in the attached photo is the most stable so far, with little to no drift in rating once tension is applied at the desired feeler gap over time. I’m open to feedback on improving accuracy or reducing variables. It’d be great to cross-ship grippers and compare ratings across other rigs. Canon’s expertise could provide valuable insight here. I am also experimenting with new tags that I can 3d print with the rating, as well as a code to distinguish the rating authority, feeler gap used, etc.. Below is a photo of some of the setup and the tag was just my first draft missing the distinguishing code which I am still thinking about. Either a QR code to a youtube rating video, or some serial number to show who, how, gap, and rating. Edited September 19 by marcb 7 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 19 Author Share Posted September 19 Slightly filed the top clamp and removed 1 piece of rubber from it so I can rate a 9 mm deep file. Tested it in a vice first before reinstalling. Now I don't need to worry about any depth of file as I never file that deep normally. Also rated a grip genie for the first time today. 4 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 19 Author Share Posted September 19 4 hours ago, marcb said: I’ve completed a version using what I had on hand, including an AASS RGC device. Thanks for the inspiration! Using a chain hoist (since winches were sold out), I’m averaging a tolerance of .006, but with nylon webbing and environmental factors, I’ve seen accuracy down to .003. I 3D-printed a strap holder to keep the strap in the same spot on the handle and splay it below the handles to prevent rubbing. I also 3D-printed a shim to keep the gripper firmly in place, maintaining parallel alignment. I’ve tested different pulley types, positions, webbing knots, and materials, and the setup in the attached photo is the most stable so far, with little to no drift in rating once tension is applied at the desired feeler gap over time. I’m open to feedback on improving accuracy or reducing variables. It’d be great to cross-ship grippers and compare ratings across other rigs. Canon’s expertise could provide valuable insight here. I am also experimenting with new tags that I can 3d print with the rating, as well as a code to distinguish the rating authority, feeler gap used, etc.. Below is a photo of some of the setup and the tag was just my first draft missing the distinguishing code which I am still thinking about. Either a QR code to a youtube rating video, or some serial number to show who, how, gap, and rating. You're welcome. Very cool, I had to look up how a chain hoist worked. The 3d printed parts look very useful. Those tags look interesting too, I'm not sure if I could ever use a tag, I just like using the bare gripper with nothing on it. I never liked dog tags swinging around as I have a very dynamic set and get all over the place with longer sets, plus I don't like random sensory stimuli of the tag hanging and swinging, like how when your hair tells you there's a spider on your hand etc. I just like using sharpie and like how it looks like that too 2 Quote Link to comment Share on other sites More sharing options...
marko Posted September 19 Share Posted September 19 4 minutes ago, C8Myotome said: You're welcome. Very cool, I had to look up how a chain hoist worked. The 3d printed parts look very useful. Those tags look interesting too, I'm not sure if I could ever use a tag, I just like using the bare gripper with nothing on it. I never liked dog tags swinging around as I have a very dynamic set and get all over the place with longer sets, plus I don't like random sensory stimuli of the tag hanging and swinging, like how when your hair tells you there's a spider on your hand etc. I just like using sharpie and like how it looks like that too Happy to send you some 3d printed pieces if you want to give them a shot. The tag I printed currently swings freely but does not fall off. However I have a version that is tight enough it wont swing to prevent the sensory issue as much as possible. I am not a fan of swinging tags and string problems, plus I hate spending $.50 - $1 per tag depending on material. PM me if interested. 2 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 25 Author Share Posted September 25 A coc 4 broke the cold weld, I will need to remount it just drilling hardware into the safety arm 2 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted September 27 Share Posted September 27 The best thing to do is have everything welded, so that way everything is solid. 1 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 27 Author Share Posted September 27 Just now, John Knowlton said: The best thing to do is have everything welded, so that way everything is solid. I'm bolting it down with 2 m10 bolts today after a new coating of paint dries 3 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted September 27 Share Posted September 27 PLEASE post pictures of finished product 2 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 27 Author Share Posted September 27 7 hours ago, John Knowlton said: PLEASE post pictures of finished product Painted the arm, took the crank apart to paint it too, it's all reassembled and bolted down now. Also switched back to steel cable 2 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted September 28 Author Share Posted September 28 Just kidding the steel cable sucks the gripper oscillates as it tries to build tension...already back to climbing rope, it operates more smoothly Here's a video of rating a previously CPW rated 203 CoC 4 at 203. I was checking it as I got it used here on this website 4 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted September 28 Share Posted September 28 Nice 1 Quote Link to comment Share on other sites More sharing options...
Luke Blackwell Posted September 28 Share Posted September 28 On 8/10/2024 at 3:09 PM, C8Myotome said: Replicates CPW ratings I like that 1 Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted 6 hours ago Author Share Posted 6 hours ago Cool things coming soon 2 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted 3 hours ago Share Posted 3 hours ago Nice 1 Quote Link to comment Share on other sites More sharing options...
John Knowlton Posted 3 hours ago Share Posted 3 hours ago How much stretch does the climbing give , and the knot in your nylon strap does it give any? Quote Link to comment Share on other sites More sharing options...
marko Posted 3 hours ago Share Posted 3 hours ago 9 minutes ago, John Knowlton said: How much stretch does the climbing give , and the knot in your nylon strap does it give any? This depends on the webbing and knot. I switched to a climbing sling that is stitched and 1 inch wide. The stretch can be beneficial as you can close gripper handles and as the stretch opens the handles you can get the thinnest feeler gauge in to take your reading. However I tend to not worry about tenths of a pound in my ratings and focus on a multi reading average. I have also noticed that the guides on the AASS etc device are narrow making it difficult to have the handles not rub steel while still closing evenly. I suspect DIY ratings will very as some may not catch this causing the gripper to over close due to the wind of the torsion spring. Quote Link to comment Share on other sites More sharing options...
C8Myotome Posted 3 hours ago Author Share Posted 3 hours ago 24 minutes ago, John Knowlton said: How much stretch does the climbing give , and the knot in your nylon strap does it give any? I'm not sure but the rope is rated to handle the poundages. I am about to switch to a different device and if all goes well ill probably be selling this winch with the original stainless steel, I could include the climbing rope. I just have a better idea I'm working on 9 minutes ago, marko said: This depends on the webbing and knot. I switched to a climbing sling that is stitched and 1 inch wide. The stretch can be beneficial as you can close gripper handles and as the stretch opens the handles you can get the thinnest feeler gauge in to take your reading. However I tend to not worry about tenths of a pound in my ratings and focus on a multi reading average. I have also noticed that the guides on the AASS etc device are narrow making it difficult to have the handles not rub steel while still closing evenly. I suspect DIY ratings will very as some may not catch this causing the gripper to over close due to the wind of the torsion spring. I agree, I don't know why the guides are there, to grind against if you don't have an anti rotation method? I am actually planning on hack sawing the guides completely off when I get a chance, as even when the handles are perfectly vertical, depending on how certain grippers handle, just the natural way it closes can bring the top handle very close to the left wall, even though the gripper is closing properly. It's only getting in the way so I will remove it, file any sharp parts, clean away any dust, and paint over it to prevent rust, same thing I did when cutting the pipe shorter. Even with a guard on the walls, this decreases available space, and any contact will increase the rating. The only workaround to the narrow walls are to start with the gripper rotated all the way to the right so it clears the left wall, but then it throws off the line of force..yeah I'll be chopping it off ASAP I'm making 2 more changes will make my ratings as consistent as they possibly can be with no room for error whatsoever. Quote Link to comment Share on other sites More sharing options...
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