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| DIY-CNC Router Table Machines Discuss the building of home-made CNC Router tables here! |
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#28
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| For those of you considering belt drive machines, I'm trying to get rid of some fairly long T5 belt hardware (belts and drive mechanisms). I have an ad listed in the CNCzone classifieds, with some really low prices, especially on the belts. These belts should be compatible with the T5 16mm wide hardware on econobelt if you don't want the sprockets I'm selling, and vice versa if you wanted to buy new belts: http://www.cnczone.com/classifieds/s...p/product/1347 Thanks, Ahren |
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#29
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| Hows progress on this one? Be really interested to hear your impressions of the end result, and maybe a video of it cutting, photos of stuff cut? Anything> ![]() Or even the story of how it exploded and took out a city block would be great...! |
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#30
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| Hi all, I’ll try and answer some of your questions. Sorry I haven’t posted in a while but the weather and real life came into the picture. Walter I got the pendant from CandCNC you can find them on the web. It works well for most functions however small movements sometimes go in the opposite direction instead of the commanded direction. They are looking into this issue. I leveled the bed at the weekend and took some video and pictures of it I’ll find somewhere to post it for you unfortunately on the last section I damaged the cutter so I need to go and get another one. The belts are working out well but I did snap the X axis small motor drive belt (my fault and I thought that might happen during building commissioning and tuning so I ordered double for the motor belts for all axis (not the main drive belts)) however I will have to replace the “X” left hand side pipe as it isn’t straight I have a 1/8 inch difference between centers. This hasn’t caused a problem to date but I’m sure it will so I may as well use the machine to remark the positions on a new pipe. The same is true of the bottom Y axis as my local store had run out of black pipe when I built it and I used EMT. If I had to do it all again (which I probably will this summer) I would change a few things all the pipes would be solid with pillow blocks (may be not the Z axis). I would also look at another design for the 2*10 on the X axis that holds the pipes maybe from an aluminum frame. The table itself I would keep as MDF as its solid and heavy. I would also weld the end plates to the Y channel. It’s cutting well for me as I only use it for large Ply and Balsa aircraft formers (up to 52 inches) and the tolerances are better than I could ever achieve by hand. Now I know I can do this I’m watching e-bay for a 60watt laser to actually laser cut the parts for a new business venture for the family but this will involve a major redesign (so long as it pays for itself and a bit more, in the long run I’ll be happy). Mach 3 works very well and I also use sheetcam which is another good product. Well that’s all for now I’ll be playing again this weekend Regards, Mark |
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#32
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| Yes Cris we have finished the router and it works really well.I haven"t had time to post because of business. Rick is out of town this week and I"m covered up but we are hoping to get something on line next week. Fred |
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#33
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| Fred, Have you found repeatability on the X axis? if so how are you measuring it ? I’m using a dial gauge and getting approx 10 thou on short runs 20thou on long cant work that one out but I think it may be flex (due to the X axis pipe twist). Y and Z are fine. Mark |
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#35
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| jsfjet I haven"t checked the repeat. one thing I"ve noticed is that when you jog it, it goes .0007 three or four times and then jumps .0014. I guess because of the belt. I"ve got my x on the short axis, and y on the long, as I like to stand at the end of the machine so I can see everything without looking over the rail. well I gotta go won"t be back until next week. Fred |
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