Kossel 2020, possible auto level issue? July 04, 2015 03:14PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 04, 2015 03:52PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 04, 2015 04:19PM |
Registered: 9 years ago Posts: 67 |
Quote
tadawson
Your gcode either needs to execute a G28 for manual level, or a G28/M401/G29/M402 (The M401/M402 deploy and retract the probe) for auto, and it is your task to insert these commands in the start gcode in your slicer - none of this is assumed, automatic, or initiated by the firmware.
I also *strongly* suggest that you do a good manual calibration no matter what . . . at the very least, it gives the auto a good starting point, and at best, you may find it works better than auto level . . .
- Tim
Re: Kossel 2020, possible auto level issue? July 04, 2015 07:45PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 05, 2015 01:22PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 05, 2015 01:23PM |
Registered: 9 years ago Posts: 67 |
Can you please give me the link to what you used to config your 3d printer, cause I cant seem to find the configuration portion for my printer.Quote
tadawson
Have you calibrated the Z axis, and the printer in general? If you manually give it G1 Z0 F3000, where does the tip end up? Where it parks immediately prior to printing isn't at Z=0 . . . it's wherever your start gcode tells it to go, and once up to temp, it's going to move to the first layer height, which in your case, appears to be below the bed.
I'm not going to rewrite the calibration procedure, since it's in the docs, but when at Z=0, a single sheet of paper should have some resistance but still move between the tip and bed. You also need to be certain that Z=0 at all three towers . . .
For auto, you need to calibrate that as well, to ensure that the probe offsets are correct . . . otherwise, the autocal has no idea whee the nozzle is and can crash.
For what it's worth, I followed Folger's docs exactly, and had a working printer on the first try . . .
- Tim
Re: Kossel 2020, possible auto level issue? July 05, 2015 01:37PM |
Registered: 9 years ago Posts: 67 |
TimQuote
tadawson
Have you calibrated the Z axis, and the printer in general? If you manually give it G1 Z0 F3000, where does the tip end up? Where it parks immediately prior to printing isn't at Z=0 . . . it's wherever your start gcode tells it to go, and once up to temp, it's going to move to the first layer height, which in your case, appears to be below the bed.
I'm not going to rewrite the calibration procedure, since it's in the docs, but when at Z=0, a single sheet of paper should have some resistance but still move between the tip and bed. You also need to be certain that Z=0 at all three towers . . .
For auto, you need to calibrate that as well, to ensure that the probe offsets are correct . . . otherwise, the autocal has no idea whee the nozzle is and can crash.
For what it's worth, I followed Folger's docs exactly, and had a working printer on the first try . . .
- Tim
Re: Kossel 2020, possible auto level issue? July 05, 2015 02:31PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 05, 2015 03:02PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 05, 2015 03:42PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 08, 2015 07:14PM |
Registered: 8 years ago Posts: 9 |
Re: Kossel 2020, possible auto level issue? July 08, 2015 07:36PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 01:13PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 01:34PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 05:13PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 06:46PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 06:48PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 07:30PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 09:39PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 11:20PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 09, 2015 11:26PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 20, 2015 08:58PM |
Registered: 9 years ago Posts: 67 |
Re: Kossel 2020, possible auto level issue? July 21, 2015 02:23AM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 21, 2015 06:48AM |
Registered: 9 years ago Posts: 67 |
Quote
tadawson
Bottoms out as in hits the stop? How horizontal are the rods when that happens? If pretty much horizontal, then you have hit the maximum diameter you can print with that rod length. If not, you likely have your linear rails mounted too high on the towers, and will need to shift them down.
if things are distorted, and X is moving too far (although I would think this would be obvious due to being so far off center when going to Z=0), then either steps/mm or microstepping may be wrong.
- Tim
Re: Kossel 2020, possible auto level issue? July 21, 2015 01:34PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 21, 2015 04:49PM |
Registered: 9 years ago Posts: 67 |
Quote
tadawson
If you hit the bottom stop, then the question becomes (as I said above), are you trying to print something larger than your printer is capable of? This printer, build as per the docs, has a max radius of about 76mm . . . . limited, as you have seen by the rods being horizontal. If you print a modest square or cube, is it square or distorted? And for that matter what are you trying to print? This may well not be a problem in the printer at all . . .
And no, I am not suggesting that Z is off center, only that if one tower was set at the wrong stepping or steps/mm, it would be seen as an offset as the head moved in Z.
- Tim
Re: Kossel 2020, possible auto level issue? July 21, 2015 06:36PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? July 21, 2015 09:06PM |
Registered: 9 years ago Posts: 67 |
Quote
tadawson
X=76, Y=76, doing the geometry gives a radius of 107, which *should* bottom things out - it's beyond the maximum radius of this printer. X=76, Y=0 is a radius of 76, X=0, Y=76 is a radius of 76, and X=53.7, Y=53.7 is a radius of 76 . . .
It still sounds like there is no problem with the printer . . . . and keep in mind that the print area is a circle, not a square . .
- Tim
Re: Kossel 2020, possible auto level issue? July 21, 2015 10:04PM |
Registered: 9 years ago Posts: 606 |
Re: Kossel 2020, possible auto level issue? August 01, 2015 01:17PM |
Registered: 9 years ago Posts: 67 |
Quote
tadawson
What you have never mentioned is exactly what you are doing (or trying to do) that causes this to happen?
Not knowing the cause, makes it very difficult to be of much help, although the simplest is simply trying to print thjngs that are too big. I suppose that if you errantly set up your slicer with 0,0 on a corner and not in the center (as it should be), it would offset everything and likely do this as well. But again, not kjowing what you are doing, I can only guess . . .
And there is a setting in Marlin (well, the current stuff anyhow) that sets maximum radius . . .
- Tim