It’s kind of hard to explain but I have an issue that some lines in de Y-direction are almost see trough. This line is thinner then al the rest. It’s orientated like a Z-axis wobble but doesn’t happen consistently. On a whole print of 4 cm height it happens 1 time, maybe 2. The weird thing is, it only happens on 1 side, not over the entire surface. It happens with thin upstanding layers. I can’t take a picture of it (not clear on a photo), but for example during this print it happened:
I filmed this because I wanted to ask if it’s normal that the bed is vibrating allot (you cant really see it but you can hear it in the video) when the printer is filling the upstanding “walls” of this case. The printer has to make allot of small movements which causes allot of vibration. (maybe this is the reason for the “see through lines”. I will try to make a photo with another camera if you don’t get what i mean http://www.youtube.com/watch?v=0W4Vdpsg7_c
I can’t answer you on that transparent lines, but I can add a comment to that vibrating part of your question.
I had the same problem. Bad vibration, and it seemed like the motors skipped steps. It turned out to be bad linear bearings (the LM8UU on the Y-axis and LM10UU on the X-axis.) I bought some new ones through eBay (None of Vellemans distrubutors in Norway could supply me with replacements, thank you Velleman for a great replacement part policy!) and increased the motor voltage to 0.5 volts. Now the vibration seems like it’s completely gone - everything is running smooth.
[quote=“magnusalex”]I can’t answer you on that transparent lines, but I can add a comment to that vibrating part of your question.
I had the same problem. Bad vibration, and it seemed like the motors skipped steps. It turned out to be bad linear bearings (the LM8UU on the Y-axis and LM10UU on the X-axis. I bought some new ones through eBay (Since none of Vellemans distrubutors in Norway can supply me with replacements, thank you Velleman for a great replacement part policy!) and increased the motor voltage to 0.5 volts. Now the vibration seems like it’s completely gone - everything is running smooth.[/quote]
I don’t get skipped steps with my printer and I lubricated and checked the bearings, they seem to work fine. The vibrating only occurs when filling very narrow lines. So the printer goes in a zig-zag pattern over a distance of maybe 1mm sideways.
lowering all the speed settings is usually not necessary. The gap infill setting can be worth trying, that’s right, and apart from that the vibration limit and acceleration settings.
Each printer is a little bit different, so you’ll have to try some values and find what works best for you. I had a similar issue to the one described by magnusalex, bearings reproducably locked up due to vibrations in certain gap infill paths. In the end, a combination of readjusting the bearings (they have to be perfectly aligned with the smooth rods in order to prevent locking) and lowering the accelerations did the trick.
lowering all the speed settings is usually not necessary. The gap infill setting can be worth trying, that’s right, and apart from that the vibration limit and acceleration settings.
Each printer is a little bit different, so you’ll have to try some values and find what works best for you. I had a similar issue to the one described by magnusalex, bearings reproducably locked up due to vibrations in certain gap infill paths. In the end, a combination of readjusting the bearings (they have to be perfectly aligned with the smooth rods in order to prevent locking) and lowering the accelerations did the trick.
Cheers,
kuraasu[/quote]
So if my motors are not skipping on 0,425V it isn’t necessary to raise the voltage to 0,5? I will try some things with the acceleration settings the next time. Can you post some values for the acceleration-limitations? Becease I have no idea in which range I have to look. The units are in mm/s². (using Slic3er)
Also in slic3er there is a “vibration limitation”-option (units in Hz) did you test this out already?
[quote=“KLucky13”]
So if my motors are not skipping on 0,425V it isn’t necessary to raise the voltage to 0,5?[/quote]
no, you don’t need to. But you still can, if you want. Up to 0.55 V, or up to 0.6 V with additional cooling (heat sink and/or fan).
[quote=“KLucky13”]
I will try some things with the acceleration settings the next time. Can you post some values for the acceleration-limitations? Becease I have no idea in which range I have to look. The units are in mm/s². (using Slic3er)
Also in slic3er there is a “vibration limitation”-option (units in Hz) did you test this out already?[/quote]
No, I didn’t try the vibration limit, that was done by someone else (search function should find it, I think). Iirc, it slows down the printer considerably, but so does a low acceleration setting.
Default acceleration as set in the firmware is 1000 mm/s², that defines your range. To get a feeling for the values, you can use M204 even during a print. E.g. send “M204 S200” to set 200 mm/s².
I think I found the problem (*fingers crossed). The cable of the standalone unit was stuffed in the case I printed to protect the printboard with all the other cables . I read that this could cause some magnetic interference. Since I took the ribbon cable out of the case, away from other cables and the motherboard, the problems seems to be gone. I’m currently printing a large print, 1 hour in, no see trough lines and my other problem (see bed moving to to the side mid print) is also gone.
