Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 12:09PM |
Registered: 8 years ago Posts: 255 |
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 01:42PM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 01:45PM |
Registered: 8 years ago Posts: 255 |
Quote
CrisCG
yes, warping near the edges. i did try to recalibrate, but there was nothing to calibrate, everything was good. I Put 3 sheet's of paper near the base. Looks like it's helping, now there's just a slight hint of warping.
Also, i tried to print ABS. I failed to make a good print. Bad first layer adhesion, hotend @ 245 degrees and the bed at 110 and still using hairspray. Is it that harder to print ABS, compared to PLA?
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 03:15PM |
Registered: 8 years ago Posts: 39 |
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 03:16PM |
Registered: 8 years ago Posts: 319 |
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hacker
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DRTak
So my Sintron Kossel cracked. I was auto leveling the bed and for some reason it decided to ram itself into the glass bed. I hit stop. But I heard something snap. I looked and couldnt find the issue. I tried to auto level and noticed the z side was messed up. I looked at the upper corner frame and the Z corner cracked. For now I have tightened the screw as much as possible but its still loose. I can print but not that well. I have ordered aluminum corners. Soon to be delivered. So another list in my Sintron upgrades. One of the only things left are the E3D hotend replacement and upgrading to a metal effector.
Upgrades now:
Changed from Ramps 1.4 to duet 0.6
Changed from Sintron Rods to Traxxas carbon rods
Changed from Sintron carriages to ABS molded carriages and wheels
Changed Sintron Gt2 belts to aftermarket Gt2 belts
Plastic Sintron Printed Frame corners to aluminum machined corners.
Analog Z probe to Dc42 IR probe
LCD 2004 by Sintron to PanelDUE by dc42 touch screen
Upgrades to Go:
Metal effector
New hotend?
Metal effector bottom plate
Obviously, it would be cheaper to order parts and build it from scratch, but I know I wouldn't do that ;-) Though I still have original corners and carriages… Actually, I have a lot — movement motors, belts and pulleys, endstops, heatbed, bolts and nuts.
If my corner cracked I'd probably glue it and print one (or more likely — three) in PETG
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 03:28PM |
Registered: 8 years ago Posts: 255 |
Quote
DRTak
Quote
hacker
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DRTak
So my Sintron Kossel cracked. I was auto leveling the bed and for some reason it decided to ram itself into the glass bed. I hit stop. But I heard something snap. I looked and couldnt find the issue. I tried to auto level and noticed the z side was messed up. I looked at the upper corner frame and the Z corner cracked. For now I have tightened the screw as much as possible but its still loose. I can print but not that well. I have ordered aluminum corners. Soon to be delivered. So another list in my Sintron upgrades. One of the only things left are the E3D hotend replacement and upgrading to a metal effector.
Upgrades now:
Changed from Ramps 1.4 to duet 0.6
Changed from Sintron Rods to Traxxas carbon rods
Changed from Sintron carriages to ABS molded carriages and wheels
Changed Sintron Gt2 belts to aftermarket Gt2 belts
Plastic Sintron Printed Frame corners to aluminum machined corners.
Analog Z probe to Dc42 IR probe
LCD 2004 by Sintron to PanelDUE by dc42 touch screen
Upgrades to Go:
Metal effector
New hotend?
Metal effector bottom plate
Obviously, it would be cheaper to order parts and build it from scratch, but I know I wouldn't do that ;-) Though I still have original corners and carriages… Actually, I have a lot — movement motors, belts and pulleys, endstops, heatbed, bolts and nuts.
If my corner cracked I'd probably glue it and print one (or more likely — three) in PETG
Well knowing what I know now, I could build one from scratch and it would likely be cheaper.
So my metal corners finally came in. I slowly put them together. Checked for the corners to be 60 deg from each other. I didnt do this the first time I made it. Then made sure the vertical parts are 90 deg. Printed the new endstop holders in PETG. Attached that. Then decided to make another change. Move all electronics below the bed and have a dedicated fan blowing over the chips.
So I analyzed the Sintron printed parts after removing them. The Z and Y upper corners were cracked were the screws were. The z bottom corner was cracked where the screws were. All bottom corner parts were warped where the NEMA motors connect to it. I assume the motors got too hot and melted the plastic. It then allowed for the motor tilt upward with the plastic giving the pulley a very slight tilt.
I also made sure that I used the pronterface axis orientation when putting the motors down. I made sure that they are x, Z, y going clockwise. Close to starting to print. Will shoot pics of my "NEW" Sintron machine soon.
Re: Ebay SINTRON Kossel Mini full kit March 07, 2016 03:35PM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 02:17AM |
Registered: 8 years ago Posts: 255 |
Quote
CrisCG
when i removed the sheets of paper that were around the printbed, the warping is really bad.
Also there's a lot of stringing. I guess i have a lot more fine tuning to make. I know temperature has a lot to do with the stringing. My PLA supplier told me it's printed best at 210, so i tried to go down to 190, but it's still bad, as it can be seen in the picture.
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 03:07AM |
Registered: 8 years ago Posts: 5,232 |
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 05:19AM |
Registered: 8 years ago Posts: 104 |
If you are printing with PLA, it's recommended to use heatbreak throat with PTFE tube inside (I'm printing using such throat). Bare metal throat tends to stick to PLA (someone suggested to add a drop of oil to filament in this case and I read that it really helps, but I did not try this method actually).Quote
Electric ant
I blocked my hothead twice in 2 days ...
Quote
CrisCG
when i removed the sheets of paper that were around the printbed, the warping is really bad.
Also there's a lot of stringing. I guess i have a lot more fine tuning to make. I know temperature has a lot to do with the stringing. My PLA supplier told me it's printed best at 210, so i tried to go down to 190, but it's still bad, as it can be seen in the picture.
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 01:45PM |
Registered: 8 years ago Posts: 319 |
Quote
hacker
Quote
DRTak
Quote
hacker
Quote
DRTak
So my Sintron Kossel cracked. I was auto leveling the bed and for some reason it decided to ram itself into the glass bed. I hit stop. But I heard something snap. I looked and couldnt find the issue. I tried to auto level and noticed the z side was messed up. I looked at the upper corner frame and the Z corner cracked. For now I have tightened the screw as much as possible but its still loose. I can print but not that well. I have ordered aluminum corners. Soon to be delivered. So another list in my Sintron upgrades. One of the only things left are the E3D hotend replacement and upgrading to a metal effector.
Upgrades now:
Changed from Ramps 1.4 to duet 0.6
Changed from Sintron Rods to Traxxas carbon rods
Changed from Sintron carriages to ABS molded carriages and wheels
Changed Sintron Gt2 belts to aftermarket Gt2 belts
Plastic Sintron Printed Frame corners to aluminum machined corners.
Analog Z probe to Dc42 IR probe
LCD 2004 by Sintron to PanelDUE by dc42 touch screen
Upgrades to Go:
Metal effector
New hotend?
Metal effector bottom plate
Obviously, it would be cheaper to order parts and build it from scratch, but I know I wouldn't do that ;-) Though I still have original corners and carriages… Actually, I have a lot — movement motors, belts and pulleys, endstops, heatbed, bolts and nuts.
If my corner cracked I'd probably glue it and print one (or more likely — three) in PETG
Well knowing what I know now, I could build one from scratch and it would likely be cheaper.
So my metal corners finally came in. I slowly put them together. Checked for the corners to be 60 deg from each other. I didnt do this the first time I made it. Then made sure the vertical parts are 90 deg. Printed the new endstop holders in PETG. Attached that. Then decided to make another change. Move all electronics below the bed and have a dedicated fan blowing over the chips.
So I analyzed the Sintron printed parts after removing them. The Z and Y upper corners were cracked were the screws were. The z bottom corner was cracked where the screws were. All bottom corner parts were warped where the NEMA motors connect to it. I assume the motors got too hot and melted the plastic. It then allowed for the motor tilt upward with the plastic giving the pulley a very slight tilt.
I also made sure that I used the pronterface axis orientation when putting the motors down. I made sure that they are x, Z, y going clockwise. Close to starting to print. Will shoot pics of my "NEW" Sintron machine soon.
Indeed you can build one for cheaper now, what Sintron does well for its money is teaching us things ;-)
Interesting things have happened to your corners. I wonder if the same happened to mine and for whatever reason I can't see it (I've just tried to check without disassembling and they seem to be intact.
And yes, I'm not sure how you move your electronics under the bed, but, just in case, this is what I've done — [www.thingiverse.com] (in case duet 0.6 has the same dimensions like 0.8.5 may be useful for you).
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 01:46PM |
Registered: 8 years ago Posts: 319 |
Quote
o_lampe
Printing a rim instead of a skirt around the part also helps against warping.
I had to retighten my corners and steppers after one month of use, because I had PETG corners and almost all screws got loose. Plastic is creeping under pressure.
Use washers where possible.
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 03:52PM |
Registered: 8 years ago Posts: 255 |
Quote
DRTak
The new metal corner bottoms are larger than the printed Sintron ones by one 2020 frame height. So I was able to tuck the duet 0.6 between the frame corners with the ethernet plug and USb plug facing out of the opening made by the extra height. I saw your post about that duet frame and feet and really wanted to print it out. But I would need to buy a thread maker to make the threads in the 2020 frame to mount the printed feet. That is what is stopping me.
Re: Ebay SINTRON Kossel Mini full kit March 08, 2016 06:29PM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 03:53AM |
Registered: 8 years ago Posts: 5,232 |
Quote
DrTak
Also, I dont think you answered why you sold off your delta?
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 05:02AM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 08:37AM |
Registered: 8 years ago Posts: 255 |
Quote
CrisCG
I can print ABS now too, first layer sticks great. But after about 30-40 min of printing, the bed being set to 100, i get an error, it says the bed got disconected, so i am unable to finish the print. I unplug it from power and USB, plug it in without changing anything else, and now it works again. Maybe there's a weak connection somewhere? Maybe the soldering under the bed? I did use a bit more solder than was needed. It was very difficult to solder, because the heatbed was absorbing the heat.
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 10:22AM |
Registered: 8 years ago Posts: 319 |
Quote
hacker
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CrisCG
I can print ABS now too, first layer sticks great. But after about 30-40 min of printing, the bed being set to 100, i get an error, it says the bed got disconected, so i am unable to finish the print. I unplug it from power and USB, plug it in without changing anything else, and now it works again. Maybe there's a weak connection somewhere? Maybe the soldering under the bed? I did use a bit more solder than was needed. It was very difficult to solder, because the heatbed was absorbing the heat.
I'd blame overheating polyfuse. I couldn't get bed to heat up to 60 degrees with the one provided by sintron, I bought supposedly the same polyfuse and had no problems up to the moment I changed from RAMPS. Another option was to fan polyfuse all the time. Not sure how it applies to your problem and running 40 mins at 100 degrees. At any rate, I'd start with checking how hot it is. Ah and another option is limiting bed duty cycle. I think it's been discussed in this thread already.
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 10:24AM |
Registered: 8 years ago Posts: 255 |
Quote
DRTak
Quote
hacker
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CrisCG
I can print ABS now too, first layer sticks great. But after about 30-40 min of printing, the bed being set to 100, i get an error, it says the bed got disconected, so i am unable to finish the print. I unplug it from power and USB, plug it in without changing anything else, and now it works again. Maybe there's a weak connection somewhere? Maybe the soldering under the bed? I did use a bit more solder than was needed. It was very difficult to solder, because the heatbed was absorbing the heat.
I'd blame overheating polyfuse. I couldn't get bed to heat up to 60 degrees with the one provided by sintron, I bought supposedly the same polyfuse and had no problems up to the moment I changed from RAMPS. Another option was to fan polyfuse all the time. Not sure how it applies to your problem and running 40 mins at 100 degrees. At any rate, I'd start with checking how hot it is. Ah and another option is limiting bed duty cycle. I think it's been discussed in this thread already.
the sintron polyfuse is very weak. It will smoke and catch on fire. You need to replace it with an inline automotive fuse. But you also need a dedicated fan on the MOSFETS of Ramps so that doesnt overheat.
Re: Ebay SINTRON Kossel Mini full kit March 09, 2016 05:33PM |
Registered: 8 years ago Posts: 319 |
Quote
hacker
Quote
DRTak
Quote
hacker
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CrisCG
I can print ABS now too, first layer sticks great. But after about 30-40 min of printing, the bed being set to 100, i get an error, it says the bed got disconected, so i am unable to finish the print. I unplug it from power and USB, plug it in without changing anything else, and now it works again. Maybe there's a weak connection somewhere? Maybe the soldering under the bed? I did use a bit more solder than was needed. It was very difficult to solder, because the heatbed was absorbing the heat.
I'd blame overheating polyfuse. I couldn't get bed to heat up to 60 degrees with the one provided by sintron, I bought supposedly the same polyfuse and had no problems up to the moment I changed from RAMPS. Another option was to fan polyfuse all the time. Not sure how it applies to your problem and running 40 mins at 100 degrees. At any rate, I'd start with checking how hot it is. Ah and another option is limiting bed duty cycle. I think it's been discussed in this thread already.
the sintron polyfuse is very weak. It will smoke and catch on fire. You need to replace it with an inline automotive fuse. But you also need a dedicated fan on the MOSFETS of Ramps so that doesnt overheat.
Re: Ebay SINTRON Kossel Mini full kit March 10, 2016 01:16PM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 10, 2016 04:06PM |
Registered: 8 years ago Posts: 319 |
Quote
CrisCG
Thank you for the suggestions. I will google some more on changing those parts, for wich i have 0 experience at this moment. For now i just solved it by having 100 degrees on the first layer, and the 90 for the rest of the print and it worked with no warping on a preety big part.
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 04:16AM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 04:22AM |
Registered: 8 years ago Posts: 255 |
Quote
CrisCG
Thank you. I'm going to print a case for the ramps and put a big fan on it and also a fan for the power supply.
I'm starting to have another issue... this is getting stranger and stranger... i tried to print today and couldn't get the first layer to stick. Cleaned the heatbed and recalibrated, applied a bit of gluestick and hairspray, the surface was very sticky even to my hand, but still no stickiness for the first layer.
So the surface and calibration where good. I tried to play with the flow rate and going up to 120% made the first layer stick perfectly. When the first layer was finished, the extruder motor began skipping steps so i went back to 100% and was still skipping. I gradually went down untill it wasn't skipping anymore, that was 87%. I looked at the print qulity and it's great.
I rechecked if the extruder is properly calibrated, extruded and measured 10cm of filament and it was spot on. I did calibrate it when i was building the printer, but the value sintron provided was good.
I looked in the Slic3r config, the First Layer Extrusion Width is set to the default of 200%.
I don't think it might have something to do with the retraction settings, i have mine set to:
- 6mm length,
- 0mm Z lift,
- 40mm/s speed,
- 0mm Extra length on restart,
- 2mm Minimum travel after retraction.
Maybe it's not extruding the proper amount when printing ??
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 04:53AM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 04:55AM |
Registered: 8 years ago Posts: 255 |
Quote
CrisCG
I just took apart the hotend. Heated up the nozzle with a torch and cleaned it good. The upper part of the hotend looked good. The filament is comming out nice, no curling. Anything else i could do to clean the hotend?
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 05:26AM |
Registered: 8 years ago Posts: 5,232 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 05:27AM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 09:12AM |
Registered: 8 years ago Posts: 39 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 10:27AM |
Registered: 8 years ago Posts: 916 |
Quote
CrisCG
I looked in the Slic3r config, the First Layer Extrusion Width is set to the default of 200%.