Well here goes... Aluminium frame router design

[CharlieRam]

The branding on the bearings is PDF, I tried searching for them but couldn't find them online, I got them off Chai before everyone switched to fred! not to sure about the rails, a bit bowed and terrible looking grinding bounce along the profiled angles but they seem smooth enough when moving by hand with a bit of pressure on them. time will tell I suppose.
I'm having a right mare trying to machine the faces flat for mounting the rails, it seems I needed a bigger mill because even with the gibstrips adjusted the bed sags with the weight when moving to the extremes of the slideways causing a bowed face so I'm going to clamp it upright and mill with an end mill instead of the flycutter I was using. what this means though is I am more than likely going to have to Epoxy my steel rails cause they are even longer and heavier than the aluminium gantry.

[CharlieRam]

Just put the bearings on my ballscrew for the gantry and gave it a spin, it's a bit bent, the runout on the ends near the bearings is about 0.001" but in the middle it's over 0.020", my DTI doesnt read any more than that but I estimate it to be about 0.030"/0,75mm. Now I can attempt to straighten it on my mill but before I do, What would be considered as a reasonable amount of runout please?
Cheers, Charlie

[JAZZCNC]

Just put the bearings on my ballscrew for the gantry and gave it a spin, it's a bit bent, the runout on the ends near the bearings is about 0.001" but in the middle it's over 0.020", my DTI doesnt read any more than that but I estimate it to be about 0.030"/0,75mm. Now I can attempt to straighten it on my mill but before I do, What would be considered as a reasonable amount of runout please?
Cheers, Charlie

Obviously the ideal is zero or near but I've seen worse work perfectly fine. I'd just fit it before doing anything because I think you'll find the runout won't be noticable when attched to ballnut mount. If you have vibration then it's an easy thing to remove and straighten.