Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 10:32AM |
Registered: 9 years ago Posts: 916 |
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Electric ant
Hi guys,
I am just about to strip my printer down and rebuild it with all the right angles this time.
I have got a digital angel finder and a good spirit level, can anyone give me some tips on the best way to achieve 3 x 60 degree corners and how to get the towers perfectly upright.
This time I want to build it right, with the angles all being correct because now all my prints lean to the left slightly, and the top edge of my print bed (in front of the Z tower) is 1.2mm lower than the rest if it.
I have a dremel in case I need to hack away at anything.
What would be the best way to put it all back together when I start the rebuild ?
Thanks guys
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 10:36AM |
Registered: 9 years ago Posts: 319 |
Quote
Electric ant
Hi guys,
I am just about to strip my printer down and rebuild it with all the right angles this time.
I have got a digital angel finder and a good spirit level, can anyone give me some tips on the best way to achieve 3 x 60 degree corners and how to get the towers perfectly upright.
This time I want to build it right, with the angles all being correct because now all my prints lean to the left slightly, and the top edge of my print bed (in front of the Z tower) is 1.2mm lower than the rest if it.
I have a dremel in case I need to hack away at anything.
What would be the best way to put it all back together when I start the rebuild ?
Thanks guys
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 02:45PM |
Registered: 8 years ago Posts: 66 |
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 03:23PM |
Registered: 9 years ago Posts: 319 |
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CrisCG
Thank you nebbian, i will try that.
I changed to nozzle and now i'm back to printing. I now know what happened. I printed ABS, than switched back to PLA and heated it to 250 degrees. I guess the PLA staied too long at this temperature and got stuck in there, creating a partial clog.
Is there a way to save this nozzle? Or trash can and that's it??
Re: Ebay SINTRON Kossel Mini full kit March 11, 2016 03:23PM |
Registered: 9 years ago Posts: 319 |
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CrisCG
Thank you nebbian, i will try that.
I changed to nozzle and now i'm back to printing. I now know what happened. I printed ABS, than switched back to PLA and heated it to 250 degrees. I guess the PLA staied too long at this temperature and got stuck in there, creating a partial clog.
Is there a way to save this nozzle? Or trash can and that's it??
Re: Ebay SINTRON Kossel Mini full kit March 12, 2016 05:25PM |
Registered: 9 years ago Posts: 319 |
Re: Ebay SINTRON Kossel Mini full kit March 13, 2016 08:13AM |
Registered: 9 years ago Posts: 5,232 |
Re: Ebay SINTRON Kossel Mini full kit March 13, 2016 11:34AM |
Registered: 9 years ago Posts: 319 |
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o_lampe
@DrTak
I think, this is related to the real endstop height. Place them in equal height and keep the M666 values as small as possible.
Re: Ebay SINTRON Kossel Mini full kit March 13, 2016 10:54PM |
Registered: 9 years ago Posts: 916 |
Re: Ebay SINTRON Kossel Mini full kit March 14, 2016 12:04PM |
Registered: 9 years ago Posts: 319 |
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nebbian
Just a note on endstop placement:
I've found that having about 2mm of travel after homing (the value in the M66 command) works well. This means that you can adjust the endstops up to 2mm before running out of adjustment.
When I do the first print of the day I always watch the thickness of the lines, and often have to adjust the values in the M666 command by 0.03 - 0.05mm. Occasionally if I've moved the printer I might have to adjust this up to 0.1mm. This is now that my printer is nicely bedded in. Previously, when still adjusting everything, I was glad of that 2mm adjustment range.
I had to play with my manual z home position until the values plugged into M666 were about 2 mm.
Re: Ebay SINTRON Kossel Mini full kit March 14, 2016 05:53PM |
Registered: 9 years ago Posts: 319 |
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hacker
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DRTak
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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
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 14, 2016 06:31PM |
Registered: 9 years ago Posts: 255 |
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DRTak
Hacker you win. Im going to print out your feet and duet holder. I was printing out a new effector. It was over half done and the duet auto shut off. This happened before on another print. When I checked the thermal readings it was 54 deg C under the heatbed where the duet was sitting. I assume it was the same temp just now. So the duet shut off and didnt finish the effector. I can only assume it gets way to hot below a heated hotbed. So I will temporarily elevate the kossel with bricks. Place fans all around the unit to cool the duet. Try and print the 4 holder parts and the 3 feet. Then have a taller cooler kossel
Re: Ebay SINTRON Kossel Mini full kit March 14, 2016 06:35PM |
Registered: 11 years ago Posts: 14,685 |
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DRTak
When I checked the thermal readings it was 54 deg C under the heatbed where the duet was sitting. I assume it was the same temp just now. So the duet shut off and didnt finish the effector. I can only assume it gets way to hot below a heated hotbed. So I will temporarily elevate the kossel with bricks. Place fans all around the unit to cool the duet. Try and print the 4 holder parts and the 3 feet. Then have a taller cooler kossel
Re: Ebay SINTRON Kossel Mini full kit March 14, 2016 08:47PM |
Registered: 9 years ago Posts: 916 |
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DRTak
Im not as savy as you. But I think I know what you are saying. For me I made this change in firmware
M208 S1 Z-2
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 11:01AM |
Registered: 9 years ago Posts: 319 |
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dc42
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DRTak
When I checked the thermal readings it was 54 deg C under the heatbed where the duet was sitting. I assume it was the same temp just now. So the duet shut off and didnt finish the effector. I can only assume it gets way to hot below a heated hotbed. So I will temporarily elevate the kossel with bricks. Place fans all around the unit to cool the duet. Try and print the 4 holder parts and the 3 feet. Then have a taller cooler kossel
If you mount electronics under a heated bed - whether Duet, RAMPS or anything else - then it is highly recommended to:
1. Use insulation under the bed heater. Thick cork or triple-skin corrugated cardboard will do.
2. Use a fan to blow air over the electronics, especially over the drivers on both sides of the PCB. Make sure that the hot air can escape and be replaced by cool air from outside the base of the printer.
I published a design for mounting a Duet and cooling fan in the base of a delta printer at [www.thingiverse.com].
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 12:39PM |
Registered: 9 years ago Posts: 255 |
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DRTak
Thanks for the input. My goal was to put ALL of the electronics below the bed. Nebbian your print is what I was looking for. Actually, I might mix prints. I might use hackers brackets and nebbians feet. I just have to reassemble the unit to print.
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 02:23PM |
Registered: 9 years ago Posts: 319 |
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hacker
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DRTak
Thanks for the input. My goal was to put ALL of the electronics below the bed. Nebbian your print is what I was looking for. Actually, I might mix prints. I might use hackers brackets and nebbians feet. I just have to reassemble the unit to print.
I'm not sure if my brackets are good for hiding *all* electronics under the bed. It puts duet right in the middle, meaning there's no room left for power supply. My power supply is ATX hanging on printed brackets under the desk, it wouldn't fit under the bed anyway.
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 02:29PM |
Registered: 9 years ago Posts: 255 |
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DRTak
Well I have an idea. I have a lot of granite laying around. I might make granite feet. I have tested it and I elevated the Kossel 90mm off the ground with granite tile. Its enough room to fit the power supply below the unit. Its also enough height that I could attach a 80mm fan directly below the unit.
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 03:27PM |
Registered: 9 years ago Posts: 319 |
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hacker
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DRTak
Well I have an idea. I have a lot of granite laying around. I might make granite feet. I have tested it and I elevated the Kossel 90mm off the ground with granite tile. Its enough room to fit the power supply below the unit. Its also enough height that I could attach a 80mm fan directly below the unit.
Sounds like a plan. If you have some marble maybe you will also want change columns to some corinthian ones ;-)
Re: Ebay SINTRON Kossel Mini full kit March 15, 2016 11:21PM |
Registered: 9 years ago Posts: 916 |
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DRTak
Nebbian. I do not see the STL file for the screen you have on the front of the kossel. The black mesh thing?
Re: Ebay SINTRON Kossel Mini full kit March 16, 2016 10:52AM |
Registered: 8 years ago Posts: 39 |
Re: Ebay SINTRON Kossel Mini full kit March 16, 2016 11:02AM |
Registered: 9 years ago Posts: 319 |
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nebbian
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DRTak
Nebbian. I do not see the STL file for the screen you have on the front of the kossel. The black mesh thing?
Ha ha that's because it's too big to print on a Sintron Kossel Mini!
I just used gutter guard:
[www.bunnings.com.au]
You can use any mesh you have lying around. On the back panel I used a solid metal panel, so that I could firmly clamp the power cord. I don't like the idea of 240 volts floating around if you accidentally pull the power cord hard.
Re: Ebay SINTRON Kossel Mini full kit March 16, 2016 11:51AM |
Registered: 9 years ago Posts: 255 |
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Electric ant
I am going to design a little case to slide a small LED strip into for the bottom of the axis to illuminate the bed.
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 06:41AM |
Registered: 9 years ago Posts: 5,232 |
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 07:16AM |
Registered: 9 years ago Posts: 67 |
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 08:15AM |
Registered: 8 years ago Posts: 39 |
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o lampe
You should print bigger parts to measure dimensions
Do you mean the feed rate of the plastic during the print ?Quote
AnHardt
0.1 - 0.2mm to large - can be caused by over extrusion
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 09:34AM |
Registered: 9 years ago Posts: 319 |
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Electric ant
Thanks for the info guys, that gives me more stuff to play about with now.
I can understand how the rod length could affect the print size now that someone else has said it, that was my initial thought.
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o lampe
You should print bigger parts to measure dimensions
I started a print of a screen cover but the size was way off, so I stopped it. The hole for the screen should have been 97mm x 39mm, mine came out at 100mm x 42mm.
The overall size however was only 2mm bigger than it should have been.
That was before the partial strip down and rebuild though, now my prints are closer to the mark but still not quite right.
Any thoughts on what's happening with the blue 30mm hollow cube in the pics above, because it didn't do it with a 20mm grey cube. And layer 2 even stayed where it should be.
Do you mean the feed rate of the plastic during the print ?Quote
AnHardt
0.1 - 0.2mm to large - can be caused by over extrusion
Sorry to sound Noob-ish, but I am. This is my first 3D printer, but already I have all the parts (except plastic pieces, I hope to print them myself) for a Prusa i3 already ordered and on the way to me.
I have about a week to get my Delta working at a level capable of printing the i3 plastics, so the sizing is the most important thing now.
Would I be right thinking that every time I change the delta_rod_length I have to recalibrate and do a test print as well ? That's not a 5 minute job.
Thanks for the help guys.
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 09:39AM |
Registered: 9 years ago Posts: 319 |
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nebbian
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DRTak
Nebbian. I do not see the STL file for the screen you have on the front of the kossel. The black mesh thing?
Ha ha that's because it's too big to print on a Sintron Kossel Mini!
I just used gutter guard:
[www.bunnings.com.au]
You can use any mesh you have lying around. On the back panel I used a solid metal panel, so that I could firmly clamp the power cord. I don't like the idea of 240 volts floating around if you accidentally pull the power cord hard.
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 12:03PM |
Registered: 9 years ago Posts: 4 |
Re: Ebay SINTRON Kossel Mini full kit March 17, 2016 10:10PM |
Registered: 9 years ago Posts: 916 |
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DRTak
Nebbian, repetier was way off in its calculation. A single corner of your pedestal takes 4.5 hrs. [www.thingiverse.com]
Repetier told me 2.5hrs. So I googled what to do. I had to adjust the ADD TO COMP PRINT TIME in settings. I had to increase it to 75%. Now it says print time is 4hrs 21min. Which I think is correct.
Needless to say, I am printing the final corner today. 4.5hrs x 3 = 13.5hrs total print time. Wow this is a labor of love. I am glad I didnt print the 90mm high pedestal.
I will also have to go to the hardware store and buy a tap and die set. Ream out the hole in the bottom of the Kossel for an M6 bolt. Then put that bolt in that you mentioned in your article. Hopefully, they sell that large of a metric bolt. In the USA they are not that prevelant.