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13-04-2013 #1
Yep that looks good. Mk10? so you have only just started then
I would increase the distance between the y axis rails to match the z axis plate to increase bending and torsional resistance.
If you have mounting clashes with the blocks then widen the plate, it would be best to make any compromises on the y axis side of things as this is more forgiving than the Z axis.
Yes I did mean 125mm from the bed to the router base. Is that not what you were asking?
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14-04-2013 #2
Thanks Ross77 yes that is what I needed to know, I was just double checking Before making any more adjustment. I appreciate your help.
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14-04-2013 #3
Just thought I'd better check but the 125mm was only an example, actual value will depend of your router collet and cutter length.
What router/spindle are you using? can it be fixed at the top as well? as the L shaped mount is also a bit weak.
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14-04-2013 #4
Last edited by Bush Flyer; 16-04-2013 at 09:09 PM.
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21-04-2013 #5
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21-04-2013 #6
No they are not at all final, they're still crap
Look at the distance from the tool tip to the bearings above. 3 miles is too much.
Find a good solid cardboard box. Remove front and back. Try standing something on top.
When you figure out how to stop it collapsing, go back to your router drawing and try again.
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21-04-2013 #7No they are not at all final, they're still crap
I would agree that the gantry sides are way to slender. You either need to reduce the height of the y axis or thicken up the side plates with some of that profile section. Having now seen the whole design I would reiterate my earlier comment about increasing the distance between the y axiz rails as that will reduce the torsional force on the gantry sides and also give a better ratio of supported to unsupported plate (not sure if that's the best way to describe it?)
The Z axis is way to complicated , get rid of all the blocks and wedging plates. i.e. make the bottom plate as one piece that bolts to the bearing and is also the spindle mount. Do the same with the top plate and make it bolt to the bearing and be the ball screw mount. this will make it lighter, stronger and much easier to build.
Keep at it, as its worth getting right before you start building.
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