Steel Framed Router

[Ricardoco]

:confused:

If I was to mount a plate (as shown in pic) to the back of the axis with many fixings would that stiffen up the gantry sufficiently?



The current design supported round rail, but this was down to cost and if available I would use profiled rail.
I also think the 25mm ballscrew is OTT but now that it has been mentioned I'll look at 20mm with 5mm pitch with pulleys and belts. I am concerned about whip in the 16mm screws, but again it could be a saving.
I am hoping to use a single ballscrew on each axis but if I find problems I think it would be easy enough to add an additional one, so I'll look out for a 4 motor and driver package.
Never thought about resonance, but kiln dry'd sand could be a good solution.

Thanks for all your input and please feel free to continue.
Jim


I can see this becoming a bit of a monster and it has to fit in my garage with all my junk.

Ok let me show some diagrams..


With no load and Spindle central this is the look of the machine from above.


Now cutting brings in to play these forces and consequences.

As the others have touched on instead of using 1 screw in the center if you use 1 on each side that will sort it out but at the end of the day it is all down to cost and accuracy. if you take the above examples and apply them to the other two axis you will see the weaknesses in your structure at the time of design not when you have spent the money, most of us on here have been through the building process and made the mistakes for you...:whistling:

BUT. my first attempt at building a machine was flawed and at the end it was not accurate but it was cool looking and i played for hours with it just amazed ide built it and to me for that split second it was PERFECT!!

then i took it to pieces and joined this forum... the rest is history...

""MOST"" of these guys on here really do know their stuff, but dont just settle for one opinion get lots of opinions and you will soon see the way or be extreamly confused :confused:


Rick