Rich Posted February 21, 2005 Report Share Posted February 21, 2005 I made this thickness scriber for marking the thicknesses on my ribs, having seen Michael doing something similar. Then I got my ribs in the mail today and they already are between 1.1 and 1.27 mm in thickness...so I won't even probably need to use it. What do you think of the concept...and is it normal to receive the ribs already that thin? Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2005 Author Report Share Posted February 21, 2005 Here's another view. It can be clamped or bolted to a workbench. Quote Link to comment Share on other sites More sharing options...
Seth_Leigh Posted February 21, 2005 Report Share Posted February 21, 2005 That's pretty cool. Are you supposed to adjust the depth first and then slide a piece of wood in underneath it, then drag it along under the point to make a scratch to the thickness you want your ribs? Quote Link to comment Share on other sites More sharing options...
Andres Sender Posted February 21, 2005 Report Share Posted February 21, 2005 Does it have any movement? It looks like you'd have to drag the rib through in order to mark it? MD's punches little holes to depth. In fact the more I think about it it seems like it would be a real drag... Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2005 Author Report Share Posted February 21, 2005 The plan was to adjust the depth first and lock it with the lock nuts, then pull it through. This is assuming the ribs are not too thick. I was going to use a toothed blade to bring it almost as deep as the scratches, then scrape the rest. I think Michael also ties his punch closed and does a similar thing...dragging the ribs through to scratch a mark. I saw a picture of him doing that. Quote Link to comment Share on other sites More sharing options...
Regis Posted February 21, 2005 Report Share Posted February 21, 2005 Rich, Pulling it through you would have to make absolutly sure to keep it level. It would be very easy to cut too deep. I didn't realize Michael this for ribs. I thought his (at least what I saw) was for plate graduating. I must have missed some of the discussion. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2005 Author Report Share Posted February 21, 2005 Go to Michael's website and look up his photo journey on making a viola. Then look at the pictures on marking the rib thickness. The second picture that says something like "close up of the markings" will show you what I intended to imitate in my own way. Also, notice the flat plate the ribs slide on underneath. Now, keep in mind I have not tried this yet. Quote Link to comment Share on other sites More sharing options...
ispirati Posted February 21, 2005 Report Share Posted February 21, 2005 Rich.. the concept is right. But...The scribe is not only used for rib. It should be designed to handle all thickness markings, such as plate graduations. Michael's version will allow to punch little holes at the intended depth for plate graduation as well as thickness marking for ribs. Yours is a single purpose scribe: for rib only. You might want to modify your design a little to handle both jobs. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2005 Author Report Share Posted February 21, 2005 I'm actually going to make one like Michael's for thickness punching. I had intended to do that from the beginning. I just liked the idea of the flat plate for the ribs and am hoping it will hold the ribs flatter. I will try to make my punch out of metal also. Quote Link to comment Share on other sites More sharing options...
ispirati Posted February 21, 2005 Report Share Posted February 21, 2005 I see what you are saying now. Please allow me for a design suggestion here. How about adding a "sliding guide" for the rib? The guide's purpose could be holding the rib stock down and direct the rib movements. The sliding guide should also have the compability to adjust the thickness to handle different rib thickness. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2005 Author Report Share Posted February 21, 2005 That would be really good...although would entail quite a bit more complicated work for this "woodworker". This was the first job I even helped with the welding on. I do find I enjoy the metal work when one has access to the right tools. Quote Link to comment Share on other sites More sharing options...
Andres Sender Posted February 21, 2005 Report Share Posted February 21, 2005 Doh! I guess it's not such a drag. I think yours will work fine, just don't let the rib get to vibrating as you pull it through, and you may want to lightly hold it down with a couple fingers on one side as it goes through. Quote Link to comment Share on other sites More sharing options...
Regis Posted February 22, 2005 Report Share Posted February 22, 2005 Rich, Talked to Michael a little while ago. Told him about this thread. Indeed, he uses his for ribs and I simply missed that one. Regis Quote Link to comment Share on other sites More sharing options...
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