Steel/Aluminium design/build, sorta smallish, cuts ali hopefully

[CraftyGeek]

What far more important is the bearing spacing on the Y axis and the more(within reason) you have the better it will be, obviously this comes at the cost of cutting width so it's a balancing act and personally I won't go any less than 200mm with 300mm being better.

Dean - could you confirm this for me.
If Y supported rails are mounted to the top/bottom of the gantry - do you mean the height of the gantry itself ie, the distance between the rail mounting surfaces?
I think my design is at 175mm currently so may need to extend it.

[njhussey]

Mart....try these people NSK LS20 Linear bearings & rails L400mm cnc thk router | eBay. Both Wobblycogs and I have had rails off them and they came quickly and seem genuine good quality although they are used. I also got some rails from YASKAWA, MITSUBISHI items in PK-USEDPARTS store on eBay! these people, ordered Thursday received Monday.

[JAZZCNC]

Dean - could you confirm this for me.

Yep no problem but I like pretty pictures to save my fingers typing so that should show better what mean when say spacing between bearings.

[Clive S]

I think Dean means the spacing of the Y rail mounting bearing mounting blocks horizontal should be spaced wider ..Clive

[JAZZCNC]

I think Dean means the spacing of the Y rail mounting bearing mounting blocks horizontal should be spaced wider ..Clive

Yep I think he does has well. .