My take on the Ingentis and problems
Posted by cjdj3
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My take on the Ingentis and problems March 23, 2015 10:36PM |
So I had a one week holiday from school, which to me was the perfect opportunity to build my printer that I've designed. It's based on the Ingentis and the Eustathios. The reason I designed it and didn't just use the Ingentis is because I enjoy doing things myself, and I learned a thing or two about 3D designing in the process of building this printer.
Anyways, here it is:
As you can see it's pretty much a Eusthios-Ingentis mashup in that it has the Eustathios mechanism but uses spectra line.
Finally got the thing up and running after a week of solid tinkering (literally wake up, tinker, go to the hardware store, eat, sleep, repeat) but I've got a frustrating issue that ran into when doing the first prints.
So I designed the printer for use with some 10mm long carbon infused stainless steel bushings. They are supposedly for 5/16 rods and so I bought some 5/16 drill rod to go along with it. Then I designed and printed the entire gantry mechanism for use with these bearings and rods. This didn't go well. There was too much clearance between the bearings and the rods for some reason, probably because they were just the wrong bearings for the jobs. This resulted in two problems. First of all the slop caused a sort of backlash-type issue when printing. When the spectra pulled on the XY block, the entire XY block would tilt a little since there was so much clearance. The second problem was weird: there was vibration when either the X or the Y axis moved - the bushings were stuttering while printing. I'm pretty sure it's the same problem this guy was having: [forums.reprap.org]
I figured these problems were because of the bad bearings, so I bought some brass oil impregnated bearings to use instead.
The steel ones i had before are on the left. The ones I have now are on the right,
I redesigned the whole thing to use these new brass bearings along with LM8uus for the print head. The whole thing slid much smoother altogether and there was little clearance between the rods and the bushings so I was very confident with the whole thing working.
Finally got it set up and this is what happens:
You might not be able to tell but there is still vibration/stutter when printing on both axes. The odd thing is there's much more vibration on the Y axis than the X axis. I don't understand why because both axes are almost identical.
Here's a video of moving the printer by hand:
[www.youtube.com]
As you can see there's a bit of resistance, but it moves fine when running it with motors.
Does anyone have any ideas? Everything should be aligned so I don't see where this problem is coming from. Should I have used self aligning bearings?
Anyways, here it is:
As you can see it's pretty much a Eusthios-Ingentis mashup in that it has the Eustathios mechanism but uses spectra line.
Finally got the thing up and running after a week of solid tinkering (literally wake up, tinker, go to the hardware store, eat, sleep, repeat) but I've got a frustrating issue that ran into when doing the first prints.
So I designed the printer for use with some 10mm long carbon infused stainless steel bushings. They are supposedly for 5/16 rods and so I bought some 5/16 drill rod to go along with it. Then I designed and printed the entire gantry mechanism for use with these bearings and rods. This didn't go well. There was too much clearance between the bearings and the rods for some reason, probably because they were just the wrong bearings for the jobs. This resulted in two problems. First of all the slop caused a sort of backlash-type issue when printing. When the spectra pulled on the XY block, the entire XY block would tilt a little since there was so much clearance. The second problem was weird: there was vibration when either the X or the Y axis moved - the bushings were stuttering while printing. I'm pretty sure it's the same problem this guy was having: [forums.reprap.org]
I figured these problems were because of the bad bearings, so I bought some brass oil impregnated bearings to use instead.
The steel ones i had before are on the left. The ones I have now are on the right,
I redesigned the whole thing to use these new brass bearings along with LM8uus for the print head. The whole thing slid much smoother altogether and there was little clearance between the rods and the bushings so I was very confident with the whole thing working.
Finally got it set up and this is what happens:
You might not be able to tell but there is still vibration/stutter when printing on both axes. The odd thing is there's much more vibration on the Y axis than the X axis. I don't understand why because both axes are almost identical.
Here's a video of moving the printer by hand:
[www.youtube.com]
As you can see there's a bit of resistance, but it moves fine when running it with motors.
Does anyone have any ideas? Everything should be aligned so I don't see where this problem is coming from. Should I have used self aligning bearings?
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