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Post by btreichel on May 6, 2020 5:07:19 GMT
I have the same problem in the Y axis but this is what’s weird in the Y plus it moves smooth no herky-jerky no binding but in the Y minus it is jerky binding like the mesh is totally wrong on the gears Yep, saw that symptom when I was having my trouble. |
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Post by mnhockeydude on May 9, 2020 6:33:45 GMT
I have the same problem in the Y axis but this is what’s weird in the Y plus it moves smooth no herky-jerky no binding but in the Y minus it is jerky binding like the mesh is totally wrong on the gears I am suddenly having this issue too and wondering if you guys have found a solution... |
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Post by Bruce on May 9, 2020 23:40:07 GMT
Read through page one of this thread. Make sure you have the 6M washer installed as a spacer between the motor mount plate and the gantry
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Post by tliechty on Nov 8, 2020 5:08:13 GMT
I spent some time playing with the distance between the rack and pinion, and learned this: If I have the rack farther from pinion it is quieter when rapid traversing but more play, if closer more noisy, but less play. I thought once when I heard a more quite traverse I was done, but realized the play. A good test for me was to tighten one bolt on the rack, move pinion to that bolt, turn on the system on to lock the motors (no need to connect to software), then put pressure on the motor with your hand parallel to the rack. If it wiggles back and forth then you need to bring the rack closer, if it does not wiggle then your either done or the rack needs to move further. Try moving it to a few distances, testing each until it's just close enough to where there is little to no wiggle. Once one bolt was at desired distance, I measured with a caliper, and replicated distance on others to +-.0025" if I remember right. Not sure if this helps or not, but it's what seemed to work for me. I posted a video of what mine sounds like: youtu.be/HGJ7lSQFP6k |
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Post by btreichel on Nov 8, 2020 5:33:14 GMT
Now get some dry lube on it and run it for some 10's of hours.
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Post by tliechty on Nov 8, 2020 11:55:49 GMT
Now get some dry lube on it and run it for some 10's of hours. Thanks! I'm just starting. Do you notice your sound/play change over time? Im trying the wd-40 specialist dry lube with PTFE in a spray can. |
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Post by btreichel on Nov 8, 2020 15:11:19 GMT
Maybe, or maybe I'm just use to it. FYI I jog my system @ 500 ipm so I use to the sound. But I do think it's gotten a bit quieter. I know the dry lube halped.
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Post by tliechty on Nov 8, 2020 17:02:15 GMT
Nice. Yeah, it's a good sound...just added the dry lube too to X, Y, and Z. Looking forward to trying out a first cut.
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Post by btreichel on Nov 8, 2020 21:41:29 GMT
Now, if you have a MDF (not al.) surface it. AKA, machine a 0.005 or 0.01 off of the whole thing using a pocket operation.
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Post by mike1332 on Nov 23, 2020 0:25:57 GMT
Now get some dry lube on it and run it for some 10's of hours. Just curious, did you find the dry live to help create a smoother movement? I’ve been running into some issues with losing steps randomly and I’ve adjusted my rails so many times but after about 10 projects it seems to start binding again |
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Post by btreichel on Nov 23, 2020 5:50:10 GMT
No, just cut down on the noise.
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Post by jpjavery on Nov 26, 2020 20:58:34 GMT
I am having an issue with my X axis, on my MegaV XL, also. Right at screw 6 it gets rough, but only going left to right. This last for about 3 inches and then it smooths right back out. Going back right to left, smooth as glass.
I have tried everything, at this point. I tightened/loosened the rail more times than I can count. I removed screws 6 and 7 from the rail, and it lessened the binding considerably. At jog speeds of 1000 mm/per minute, it rumbles through that spot. Any lower (homing speeds) it gets stuck and cant get through that spot (again, ONLY while traveling left to right) and jams up. While carving, it constantly skips only in this spot, left to right, and ruins the piece at some point, usually through cumulative stutters, or one massive stutter that will throw the carving off by about 1/8".
At this point, I am convinced that the rail is bent or twisted slightly at that spot, or that the teeth in the rail are slightly off in that one spot for some reason. If anyone has any other ideas, I would love to try them before calling the support line (I emailed, but no response) and requesting a new X-axis rail.
The offset washers are installed, the wheels are snug against the rail, and it is literally this one 3 inch section that will not co-operate. I have worked around it, by setting up my pieces to avoid that area, but this is not a tenable long-term solution, as I lose the last 8 or so inches on the right side of the machine, and I bought the XL to use as much of the work area as possible.
Thanks in advance!
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Post by btreichel on Nov 27, 2020 5:28:43 GMT
check to make sure the spacer washers are in place, forgot on and had hell with that rail until I found out.
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Post by jpjavery on Nov 27, 2020 19:11:00 GMT
The spacers are in there, and the problem is only on one 2-3 inch section of track, between the 6th and 7th screw of the X-axis, and the problem only persists in that area while going left to right, and not the opposite direction. I appreciate the suggestion, though!  |
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Post by Bruce on Nov 29, 2020 2:51:14 GMT
If you find you don't have enough adjustment on the rack you can add one or two precision ring shim (washer spacer) that is 0.2mm thick to the motor mount in addition to the M6 washer. 1074-1095 Spring Steel Ring Shim, 0.2mm Thick, 6mm ID. www.mcmaster.com/98055A106/ |
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