Thread: "Y" Axis Rails

welcome first poster

i had to google FLA Machine

ok , so its bearings running on mild steel guides , ok ,

NO WONDER

use proper guilds if your serious , unless its a laser or plasma cutter or water jet your looking at, then i still recommend using proper guides

getting steel plate machined parallel , and tempered will cost more than proper guides , from factory they are not accurate

the FLA setup i found on google >http://www.cnczone.com/forums/diy-cn...0_4_x_4_r.html

Originally Posted by SawDustSniffer

welcome first poster

i had to google FLA Machine

ok , so its bearings running on mild steel guides , ok ,

NO WONDER

use proper guilds if your serious , unless its a laser or plasma cutter or water jet your looking at, then i still recommend using proper guides

getting steel plate machined parallel , and tempered will cost more than proper guides , from factory they are not accurate

the FLA setup i found on google >New Machine Build FLA-300 4' x 4' R&P Router - CNCzone.com-The Largest Machinist Community on the net!

Hi, Thanks SawDustSniffer, I should have been a bit clearer it was a Fine Line Automation FLA-100 I think. There were photos and it looked like galling on the rails to me on the Forum that I saw. I was wondering how he went fixing it, if at all.

I am doing one to the same plans and seems most people are going OK with them.

Originally Posted by NedG

Hi, I was wondering how he went fixing it, if at all.

probably just replaced the mild steel " rolled " plate , from an off cut , replacing it dosnt fix the problem

seen some where they use 90deg angle and V-bearings

are you talking about this one >?????FLA100 Plans Updated And New Assembly Videos : Fine Line Automation
with a speal out there rails > quote, "the rails made of 1018 cold rolled steel flat stock. There is no finish on the rails, so it is recommended they get a light coating of oil from time to time."

cold rolled steel in widths of 4 inch flat bar come in tolerances of +/- 4/1000 inch or +/- 0.10mm , as the size changes you will have to set your bearing carriages up to the widest point of the rail , leaving a maximum slack of 0.20mm on the thinnest part of the rail, you could set it up to the thinnest and grind the flat bar down until the carriage runs smooth for a tighter tolerance , i don't recommend a 4 inch angle grinder
,. if you use these rails , dont waste your money on top quality "Ball screws" , galvanized "all thread" will do

with the kit starting US$1599 ( no spindle , no stepper drivers ) + the right royally rodgering US postal service charges , do your self a favor and look at " Happy Loves $2000 Ebay offerings for a " 6040 CNC", or $3000 for a " 9060 CNC" is the same size , with 10x the accuracy