Well after reading through most off the build logs I thought I would give it ago,I have to say that not really knowing a lot about electronics and stepper motors I get confused easy.
My goal is to make a simple strong build which will be able to cut hard woods and aluminium at a reasonable speeds, I only have room in my workshop for a machine off 900mmx800mm I have done three design off the base A,B,C which I will upload, my abilities on sketchup are also pretty limited so I hope you can make them out ok.I have done the design using 60mmx60mmx4mm box which I would have to buy but I do have 50mmx50mmx4mm box in stock and if I could use it it would save me a few pounds. I can weld ok and hope to weld most off the build and limit the amount off holes to be drilled.I haven't designed a gantry yet as I wanted to get the base right first.My build budget is Around £1500 mark.
All help will be gratefully accepted
Looks nice and sturdy and there's no reason why you can't use 50x50x40 but I would say if you haven't already bought the linear rails then don't buy round rails.
Profiled linear rails have really come down in price in the last year or so and it's not worth buying the round type IMO. They simply don't compare in performance and accuracy.
Get the rest of machine designed then well take another look. Don't forget to think about cables runs and Home/limit switch mounting etc.
Thanks for the advice JAZZ ,I think I will get 60x60 box for the side rails and use 50x50 for the cross sections and end rail.I plan on just using angle for the cable tray and also it will give some protection to the ballscrew I have put it in the drawings.I plan to make the gantry out off the 50x50 box as I don't mind welding do you think this would be ok? or a waste off time doing.I haven't ordered any rails yet
14-12-2014 #4Spelling mistakes are not intentional, I only seem to see them some time after I've posted
I haven't ordered anything yet still messing about on sketchup lol.But I will take you and Jazzcnc advise and get the Hiwin type.Heres my first Attempt at a gantry It took me five hours to do this on sketchup I don't know what I was doing but I kept deleting parts off the sketch.
just another +1 on the hiwin rails ...
for the price difference it IS money well worth it !
for the gantry , dont have the gantry side like an upside down T as it offsets the spindle too much and the spindle will go quite a bit over the tables surface. using a L shape might be better and reduce the amount you go off the table (unless you want to ofcourse)
15-12-2014 #7Spelling mistakes are not intentional, I only seem to see them some time after I've posted
The Following User Says Thank You to EddyCurrent For This Useful Post:
Thanks for the advice would this be a better design.
That setup would ensure you get the Z axis very close to the gantry and the motor should be positioned as near to the centre of the X bearings as possible.
Only problem i envisage is the alignment of the gantry rails, do have a solution to this ?
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