Hey everyone, i started my machine up last evening and has not been turned on since my last post, i homed the torch from last position when i cut the test squares, as i jogged at 400 IPM from home it immediately bound up about 2-3 inches from home. the machine was cold and maybe 50 degrees in the shop and has not been turned on.
Could this happen if the drive motors are cold? This has happened more than once before from when it was off. Also as stated previously we had everything adjusted right and didnt have any issues at the time.
First off, you are going to have to isolate what is binding. Do you know which access is binding up? Once it is bound up, with the machine powered down can you turn the lead screw by hand? If not I’m thinking you could loosen the locking collars one at a time on the stepper motors, and then see if you can turn the lead screw.
Just an idea, I don’t have an XR table, just trying to help you isolate.
the motor closest to home position is what/where its binding at. i can check again this evening if it does it again and see if i can turn the lead screw.
Can you check to see if it’s the ballscrew assembly binding, or the motor? Are the two stepper motors the same? Maybe disconnect the stepper motors and then operate them to see if the motor in question will run with no load.
It’s almost sounds like one motor is turning faster then the other. Does it work at a slower speed?
when we adjusted the machine 2 weeks ago i didnt have any binding problems, it ran the break in program perfect. it does seem that the Y2 motor is spinning slower than Y1, that did come to mind as well. it will jog no problem under 400 IPM
can you clarify what you mean by disconnect the stepper motors?
I was thinking just having the motors disconnected from the lead screws and setting on the side of your machine. Still hooked to the electronics so you can see if it binds when turning at speed with nothing hooked to it. You will need to disconnect both of them so the other one doesn’t try and move the gantry by itself.
One other thing when it binds up you should be able to measure the distance on each side to see if one side is moving more then the other. You might have to measure when it is homed and get a reference mark to measure from.
Another thought if you just jog the machine to the home position and then move the access at high speed does it still bind. Maybe something is wrong in the homing/limit switch setup and it is putting the machine in a bind when it is homed.
I have to go do chores, I’ll be back after while.
Tim
so unscrew the lead screw bearing assembly unit from the motors? I think that 4 allen head screws?
Like I said I don’t have an XR table. I was thinking you could remove the stepper motors easily, after looking at the manual I can see that is not the case. I wish I could be more help but not having an XR table and not being in front of your table I can only through out ideas.
1 Like
all good Tim , i appreciate the help thank you
1 Like
Sam, Any luck isolating where it is binding?
I did……I think. So I left the machine on so the motors were warm before I started, I honed the machine and the same thing happened. It bound up about 2-3” on the Y2 and the Y1 was about 4 or so inches when I stopped it.
I moved the gantry around several times and rehomed it again and did the same. At this point I moved the limit switch out or forwarded to see if this would help, I would say that it did because after than it didn’t bind up, however I did notice that powder cost was chipping where it was binding also so I scraped off what was loose and sanded with Emory cloth to smooth it out, that seemed to have fixed it , or at least it didn’t bind up anymore last night.
I then adjusted my Kerf setting to get my 3” test squares closer to 3”, I went from factory setting of 0.074” to 0.060”, then to 0.056” and finally to 0.0.50” for the Kerf on the 3rd square and I was 0.005” off from 3” on one side and about 0.019” or so on the other side. So adjusting the kerf did make my part more square.
Reason I asked about the motors being warm is the Trumpf Trupunch 5000 and our Trumpf CO2 laser do not like being cold, as well as our Mazak machines. They have to warm up some before we use them in our sheet metal shop.
1 Like
Glad you got it figured out.