fresh start 8x4 build

[Boyan Silyavski]

I mean D4 to be so long /260-300mm/ that router bit stays inside it. Its called -overhang/ how far from X rail is the spindle nose. There is center of gravity also. The nearest the bit to the center of gravity, the better. Ideally all should be designed so that is perfectly balanced .

you could read basic info about forces there http://www.cncroutersource.com/do-it...NC-router.html


But you could do it out of this concept as you like, if using Hiwing 20 rails and carriages. They are so strong that overhang is not a problem. Just i like things to be perfectly balanced and engineered

[reefy86]

thanks boyan, from spindle nose to x axis is 151mm, d4 as you describe is 215mm.

Ash

[reefy86]

im hoping im slightly correct but are these images right?

[Boyan Silyavski]

Hi, just answered your PM but could not upload pictures there. Just saw what you have posted as images .


In short - NO. Dont despair, but this is not right. You will figure it out :-).

Lets see:





This is how its the right way:






Look at the ideal/ my machine is on the extreme side so not necessary so much / but hence is nice for illustration:





Also this is the correct way, i would say the perfect way for the Z plate, so its naturally reinforced by the rails and the plates at the back and




And finally, design so much travel and space brackets so that at lowest position of Z axis the spindle still reinforces the Z plate. Ignore that the spindle is small , because its small one 0.8kw and Z axis real travel is 180mm . NOrmal 2.2kw or 3kw spindle is much longer. This just to illustrate eventual max. Position: