What do you guys think the optimal size for an OX would be? I have enough V-slot to make it 1000mm X 1500mm but am unsure if I should make it this large as I am worried about it flexing too much to have any accuracy at all. Looking for useful suggestions from the group. Thanks
Hi Anthony I personally went 1200 X 1000 to me it all depends on you spindle size, weight and what your cutting. I have a 1.5kw that weights around 4.5kg and wish I made my size 1000y by 800x due to flex.
I have a 1.5kw spindle as well. Well, I will as soon as I exchange the 2.2kw one they sent me by mistake.
Something I learned: I built mine to accommodate a 2’ x 4’ sheet with a few inches clearance on the left and right. But I can’t reach the long ends. My advice would be to go the full 1000x1500. You can always cut it down to size later. Make sure you over build. I would say polycarbonate wheels are a necessity at this point in time. But I’ve proven you can get away with much less.
I ordered the best wheels available, the Xtreme Solid V Wheels. If I went 800 X 1500, I would have a work area of 24.5 X 50 inches. I think that is the largest I will need. I am afraid that at 1000mm width it will flex too much.
Well, you can always cut it down later, as long as you ordered enough extrusions.
+Peter van der Walt mounted his rails to the side of his table, I was thinking of doing the same thing, so I really don’t want to have to remake the table if I need to go smaller.
I agree. I like that setup alot.
It saves a few pcs of v-slot that way.
But I think you should use C Beam for your Y axis if you do that, like the R7 design
if youre worried about flex, double up or use the deflection calculator. Im going to have 0.02mm on my span, which is fine with me!
Where can I find the deflection calculator? And one thing I will be doing to stiffen it up is to pin the two 20X60 x axis extrusions together,. This should eliminate some flex.
A dewalt 611 weighs 3.4lbs, and you want to do it for it being in the very centre, as thats your “extreme”.
You should have 3 rails on your X
I have a 1.5kw water cooled spindle on its way. Not sure of its weight yet. But thanks for the link, I appreciate it.
So how do I enter all 3 profiles so it calculates based on all 3?
you would use the value for a 60x80 or the like.
or if that info isnt there, do 1/2 the weight? The 3rd rail is just support so only helps marginally for flex as it reduces the ability to buckle.
OK, I understand now. Thanks.
I get a deflection of .02mm on the X axis, I can live with that.
Sub- 1 thousandth of an inch? Yeah, you’ll be fine.