New Build 1000x600x200mm (newbie)

[JAZZCNC]

What Profile are you using that those rails sit onto because the rails look nearly as wide as the profile which if 20mm or 30mm the profile it is far too weak.

That or things are very much out of scale which makes designing very difficult.!

Your change is weak and complicated so I wouldn't take that route.

[Noplace]

What Profile are you using that those rails sit onto because the rails look nearly as wide as the profile which if 20mm or 30mm the profile it is far too weak.

That or things are very much out of scale which makes designing very difficult.!

Your change is weak and complicated so I wouldn't take that route.

It's 40x80mm

[Noplace]

How does this look?

[JAZZCNC]

How does this look?

Much better but again you don't have much clearence between base and lower gantry so just becareful you don't limit your options.
What size are those rails.? They must be 30mm if profile is 40 and 30mm is massive OTT.

You havent shown a view with how the bearing plates fit with regards gantry cross piece, don't get caught out with common Gotcha of not beaing able to get to bearing bolts.!!

With you have such short travel distance then I change my statement about having Z rails on front plate. With this short stubby design you'll be better with them on the rear plate as you will hardly ever extend below the bottom of the rear plate when spindle is attached. In this case you'll need to go up more than down for tool clearence so you may need longer rear plate.

I suggest you continue with design and draw in the rest of the Z axis with spinlde to get an idea of what cut travel you'll have available.

[Noplace]

unfortunatly like an idiot i bought the rails 2 months ago while having a vague idea of what I want, so I have to work it in.

working on the design, just a quick update on the side showing how the rails and ballscrew work together, i had to redesign a bit:

[njhussey]

How big are the bolts for the rails? Will they fit in the profile that you've drawn? As Jazz says the profile is looking a bit small and weak, you could do with beefing them up a bit. It's looking like you're putting the Y axis ball screw on the front of the gantry, you'd be better putting it on the back and bringing your spindle nearer the front of the Y axis otherwise it could be quite a way off the front and a way in front of the X axis bearings. Are all the rails the same size?

[Noplace]

How big are the bolts for the rails? Will they fit in the profile that you've drawn? As Jazz says the profile is looking a bit small and weak, you could do with beefing them up a bit. It's looking like you're putting the Y axis ball screw on the front of the gantry, you'd be better putting it on the back and bringing your spindle nearer the front of the Y axis otherwise it could be quite a way off the front and a way in front of the X axis bearings. Are all the rails the same size?

can't I just reduce the space I reserved at back of gantry from 80mm to 40mm? so that the plates and spindle come within the bearing range

[Boyan Silyavski]

What Dean is saying is you have very small clearance from gantry to bed. You need sth like 230mm distance for a 200mm Z axis travel, if well designed. Do you have that space as drawn?

[Noplace]

I'm adjusting to lower Z depth, around 80mm would be ok for me