To rework the Y axis or more ?
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so him thinking about reworking my Y axis on the printer , i was testing for higher acceleration and found out that my current setup because of the long BMGx2 mount cause flexing issue that are not visible at low speed. so i need to reduce the mass and shorten the extruder mount . removing the 2040 extrusion would be the first step but it make me redesign all the pulley and motor mount for that axis .
so i have a few idea to maybe try. i could use some flat aluminum bar and screw the HGR15 rail on it , or i just use the HGR15 rail directly without any support and save weight , while reworking the mount and shortening everything, that would definitively help , it would reduce weight around of .5 to 1kg i believe .
The other possibility here would be that i rework the whole printer and go from Cartesian to core xy which would then remove the stepper motor and eliminate another .5kg , in total it could be around 1 to 1.5 kg less . with current setup my best print speed without having too much ringing is around 20 to 40mm/sec, higher and it start to be a lot worse.
if i was to switch to core xy i would definitively go with 12mm belt since they dont stretch as much.
When i started this project my goal was to achieve nice print at over 50mm/sec minimum and him not there yet .
so i am in need of idea or suggestion to achieve my goal . Any advice ?
here the actual Y axis
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@dad003 That looks like a LOT of moving mass. I've never seen a wiring harness to an extruder carriage that has so much "stuff" in it.
Converting to corexy would probably take a major redesign, but should allow much lower moving mass. My corexy printer uses a 24 mm x 8 mm linear guide for the X axis without any other support and it works well, but the bed is only 300 mm wide. It looks like your machine may be bigger than that and might require some additional support.
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@dad003
The problem with reworking is, you might need some new printed parts, but if this is your only printer, you're in trouble.
Same with complete redesign.
If you feel comfortable with designing and printing everything you need for your project before you take apart the printer, then go for it. I'd opt for CoreXY. -
it my only operational printer , but i would definitively print all the piece first before i take a part anything . i still have a few piece to draw , the more i think about it it seem that a redesign is the way to go
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i ended up to draw a few things not fully sure about the belt tensioner. the reworked Y axis do look good on the other hand , belt need to be tightened from the back plate. any suggestion on that ?
