Hey Mates! Loaded up the T12 Spring Loaded Anti-Backlash Nut this morning and it seems like it’s spring loaded a bit too much. When jogging at Rapid Speeds in gSender, it binds. Didn’t realize it until I went to start a project and it failed on the X-Axis. If I jog it around in normal or precise, it works fine.
First check was to see if I over tightened the bolts connecting to the Z Plate. - All good, just enough to compress the lock washers.
Second check was the clamping nuts for the lead screw. - All good, roughly a 16th of play.
Furthermore, I cleaned the lead screw before adding the nut. -So it’s not buildup.
Should I WD-40 this sucker and see what happens? lol
Thanks for posting, great question! Chatting with the CS team, our recommendation is to lightly spray with WD-40 and run the gantry back and forth as part of the break in period.
If the T12 spring-loaded backlash nut is binding, we recommend lubricating the leadscrew with a light coating of WD-40 or a similar lubricant. Then run the gantry back and forth along the leadscrew to break them in.
Jog on normal speed, increasing to rapid after a few passes. If the T12 binds on rapid, reduce the speed to normal and re-run a few more passes.
Wipe the lead screw after to prevent buildup of dust on the lead screws.
I have this precise problem. I used a dry lube and it had no effect over 3000mm/min. The coupler and nut on the lead screw are tight and not applying lateral tension. I loosened the screws on the anti-backlash nut and ran it back and forth to try and align the nut, to the same effect. The old anti-backlash nut does not seem to have this problem, even when the x-axis lead screw has lateral tension, which prevents excessive wobble at higher feed rates. I thought maybe the nut needed to break in but after two hours of dry lube and movement it is behaving as it was since putting the new anti-backlash nut on.
Last few days I’ve been pulling my hair out trying to resolve a binding issue on the X axis.
Changed the old anti-backlash nut with a new one, still binds.
Changed the v-wheels on the gantry, still binds.
Made sure all adjustments were tweaked, still binds.
Changed the coupler and another anti-backlash nut, still binds.
Saw in here that people suggested dropping to Normal and running it back and forth so I did that and it didn’t bind. Back to Rapid and it bound again.
I dropped the jogging speed to 150 and it seems to be happy now…lot of wasted time!
I had the same issue. I found that I had to loosen the bolts connecting to the Z plate even further. To the point that they’re “just” tight enough to hold it in place, almost on the edge of being slightly loose. You could try loosening the bolts entirely so the AB nuts alignment has some free-play, just for testing to see if the issue goes away.
It seems the tightness of these bolts causes a small alignment issue along the lead screw. I found it got worse the closer the router mount gets to the extreme end of the X gantry (but not exclusively). I’ve toyed with inserting some [very thin] spacer washer, but not tried that yet.
To be honest, I found similar with the original AB nuts, but seems worse with the spring-loaded ones.
I have tried lube, readjusting dozens of times . Changing speeds, running x axis at different speeds while jogging to break in nuts. All of this wasted time. Has anyone found a solution to this problem ? Brand new 48 X 30 2.5, and a week, still haven’t made first cut. Getting frustrated, Onefinity might be my answer.
