Thread: Router build
+1 clive ... i hear ya ... but then you go down the whole road of tuning fork ... and defeat the whole purpose of having the rails move
im going with bearings moving , like i drew on the original concept, its much easier and i doubt there will be any loss by going with this
silyavski ... i have enough travel on the rails and screws ... its just the design now. I have about 230mm between gantry beam and table top. but only having 230mm of movement isnt enough , i need another 120mm minimum to pull out a long series bit
for example - if i were to machine a block of foam for a plug that is 160mm thick .... and lets say i needed to machine right to the bottom of the foam , so i would need a bit of 120mm long ( the router clears the piece for arguments sake)
then the travel required would be the piece 160mm + 120mm bit + clearance 50mm = 320mm right ? if the move the block up like Clive suggested by 90mm then i would have sufficient clearance
going to redraw bearings the other way and have a scrutinize
In this case if you have to drop the spindle in the clamp this then gives you a long fixed length lever that is a long tuning fork.!! That never changes it pitch no matter if you raise the Z axis.
This does make a differance and in some materials you will clearly see it compared to having rails moving. You can certainly forget cutting aluminium and expect any kind of decent finish.!!
Jazz , I do agree ....
Do you feel I should just raise the bearing a bit to have a touch more clearance like Clive suggests ?
I don't find many examples of moving rails ... Got any links ;-)
Most machine builds on this forum use moving rails so Check them out.!
To be honest if your just building a Router for cutting wood and soft materials then it's not a problem but if you want to cut harder materials which often require shorter tooling then it does become a problem. Moving rails helps get around this without messing around raising the work or having moving table.
If you want good combination so can cut all materials then have a moving table along with moving rails.
a little progress ....
i thought id try out using epoxy between two steel sheets and i gotta say it works great ! there is no ring from hitting the the beam , and its not 'that' heavy
wish i could have done some before and after tests ... but i dont have the time right now to play
did a quick test run of the X and Y axis today , its super smooth and so quiet, man you gotta love servo's !
Looking great! How did you manage to weld those plates with the oval holes inside the tubing
i cut the inner tubing into sections, then welded the oval plate piece and two rectangle sections together , repeat for the entire length
Did the inner tube have to be metal or was it part of the strength too ?
Last edited by EddyCurrent; 18-12-2014 at 06:13 PM.Spelling mistakes are not intentional, I only seem to see them some time after I've posted
yea must be metal as this completes the sandwich ..
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