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27-12-2016 #21
Good job your using round rails because wouldn't get away with rough work like this if using Profiled linear rails.!!
Tom is correct your level of accuracy will be low or will require lot of shimming and tweaking. How much will only come to light when finished and being used at which point you'll wished you'd took little more care when building.
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27-12-2016 #22
Here is my latest build
http://www.mycncuk.com/threads/9073-...-router-3-axis
Small work area but was aiming for accuracy. Box 100x100 end up with ~0.07mm that is why i build again fixed gantry one, link:
http://www.mycncuk.com/threads/10459...teel-frame-MK2
Boyan is master in precision fallow him - he gets 0.02mm wich is more than my chinese mill
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27-12-2016 #23
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27-12-2016 #24
My frame was not more than 1mm warp as I tack it everything and weld one bead at the time, cool down and opposite side and so on. I have to admit that I broke my rule and did not let to cool enough (firstly was warp corners down than after cool opposite) - £100+ waste on steel and gas, lesson learnt. I bit it with sledge hammer, driven by the car and finally filled down, so my 8mm bars became 4mm in places:)
Now I use Tig just to see if I can do better
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27-12-2016 #25
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27-12-2016 #26
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27-12-2016 #27
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27-12-2016 #28
I'm not into jealousy but I am realist and know there's no way he's measuring 0.02mm over 3000mm like he's claimed in the past or even over shorter distance.!! . . . Ask me why.?
Ok I'll tell you.!! . . . . . Would be bloody impossible because he's using C7 ballscrews From China which at best will only give 0.05mm over 300mm. Then throw in few belts/pulleys etc and this goes down further.
So who's fooling who.?
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27-12-2016 #29
I just like the way you assumed I needed to be more careful. What exactly gives you the impression I haven't been?
Hence the reason I will see how it goes when it's done. I've endeavoured to make it as square as possible on all axes and feel comfortable that I've managed to achieve that within the best of my ability.
I'll be sure to let you know if you're right or wrong once it's done and I tweak everything :)
Sent from my SM-G920I using Tapatalk
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27-12-2016 #30
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