Amazing coincidence, I was printing some stuff yesterday and moaning about the hole sizes and did a very similar thing by printing a set of 6 of them at 3.1, 3.2, 3.3, 3.4, 3.5, 3.6mm for an interference fit on a 3mm shaft.
I don't think its the end of the world if the machine is running at 79 RPM! If you were recording records off of that BSR and uploading them to youtube, then I'd be a little more concerned. Great work on this so far.
Thanks 😀. If I upload any records, it probably will be on this deck, though I think the lathe turned idler wheel was better at 78rpm, so I would probably use that. Many early 78s were 80rpm (or some other similar number) anyway, so absolute accuracy is not really required. 😀👍
Why were all the records warped? 3d printing is very clever, this is well beyond anything I could do, all in all you did a great job on making the idle wheel... Enjoyed the watch...
The 3m sandpaper is twice as much money and 10 times better. You will not regret using good quality name brand paper. There IS a difference. The printed one, which came out looking very nice, seems to have more wow and flutter. Probably because the hole was too big.
I certainly could do with picking up some finer grade sandpaper. Maybe I will buy better quality stuff 😉. The 3D printed one was easier to make. The plastic used on the white one from the lathe is I think harder and certainly smoother so at least shouldn't wear as quickly but both really need a brass or bronze bushing. Thanks 👍😀
// BSR Idler // 40mm BSR idler wheel // mrrgstuff 2020 // this is free - however if you use it in a video etc - I would appreciate a shoutout :-) Thanks // This wheel/pulley require an O ring of the following size // 29mm internal diameter // 37mm external diameter // 4mm cross section // The diameter of the wheel when the O ring is fitted is about 40mm $fn=64; // This needs to be about 4.1mm on my BSR but prints out smaller and will probably need to be drilled out // Print 'holetest' part below to work out rigth size for you holeDiameter = 4.3; idlerOutside = 35; idlerInside = 32; dish = 17; // diameter of indent on top of idler wheel module hole(d) { cylinder(h=8, r=d/2, center=true); } module idlerBlank() // basic idler peice which is the modified for top and bottom { cylinder(r1=idlerOutside/2,r2=idlerInside/2,h=2,center=true); } module idlerBottom() { difference(){ union(){ idlerBlank(); translate([0,0,1.5]) idlerMiddle(); } union(){ translate([0,0,2.1]) groove(); hole(holeDiameter); } } } module idlerMiddle() { cylinder(r=idlerInside/2,h=1,center=true); } module idlerTop() { difference(){ idlerBlank(); dishCutout(); } translate([0,0,1.75]) rim(); } module rim() { difference(){ cylinder(r=(dish+1)/2,h=1.5,center=true); cylinder(r=(dish)/2,h=2,center=true); } } module groove() { difference(){ cylinder(r=(dish+1.5)/2,h=2,center=true); cylinder(r=(dish-.5)/2,h=2.5,center=true); } } module dishCutout() { cylinder(r1=(dish+5)/2,r2=dish/2,h=2.5,center=true); } // hole test // print holes 4.0 to 4.8mm to see which fits best module hole(d) { $fn=64; cylinder(h=8, r=d/2, center=false); } module holeTest() { difference(){ block(); holes(); } } module block() { cube([12,50,4]); } module holes() { inc = 8; translate([6,5,-1]) hole(4); translate([6,5+inc,-1]) hole(4.2); translate([6,5+inc*2,-1]) hole(4.4); translate([6,5+inc*3,-1]) hole(4.6); translate([6,5+inc*4,-1]) hole(4.8); translate([6,5+inc*5,-1]) hole(5.0); } offset = 15; // just use for arrange the 2 halfs on the build plate translate([-offset,-offset,0]) idlerBottom(); translate([offset,offset,0]) idlerTop(); //translate([-20,20,-1]) holeTest(); // use this to print the holetest part
@stevenpalm9484 In the module hole(d), there is the cylinder statement, which controls the depth of the hole. Try increasing the 8 to a larger value. It is very difficult to 3D print and accurate hole of such a small diameter, so I usually just drill them out to size anyway. Hope that helps. Thanks 😀 👍
It's a cleaning arm that travels in front of the tonearm and has brushes on the end. It came with the deck, and it's not clear if it is original or not. Haven't used it yet. Thanks👍😀
I have sent you the file. I've also just upgraded the cartridge on mine. You may find this video interesting: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MXGczxwlMYc.htmlsi=HoNDKSI821qsCVnQ Thanks 😀 👍
Yes indeed. A 3D printed diaphragm should be easy and work fairly well. I know some people have done 3D printed sound boxes, which is something I would like to try too. Thanks 😀👍
mrrgstuff good idea , it would be nice to have a test soundbox that you could easily change various diaphragms in and out of. I am always slightly concerned that every time I fiddle with an original one something will break on it.
