On Sunday 16 August 2020 18:24:03 John Dammeyer wrote: > -----Original Message----- > > > From: Gene Heskett [mailto:ghesk...@shentel.net] > > > > > Mine's a CSTAR P802M bought back in December 2015. Has problems > > > but overall is like my table saw. I go up to it. Turn it on. Use > > > it. Turn it off. I've probably printed almost 1000 parts of > > > various types with it now. > > > > > > I added a glass plate and underneath placed an insulating pad > > > bought at Home Depot used for preventing burning wood when > > > soldering water pipes. > > > > > > This is what it looks like. > > > https://www.banggood.com/TRONXY-P802M-DIY-3D-Printer-Kit-220+220+2 > > >40mm > > > -Printing-Size-Support-Off-line-Print-1_75mm-0_4mm-p-1149546.html? > > >akmCl ientCountry=CA&&cur_warehouse=CN > > > > Looks a hair better than an Ender 3 Pro, with dual z motors. Looks > > like the extruder motor is in the carriage? I like that too. I > > don't like the spool sitting on the table though. And at that > > price, I might get one anyway. > > There are two philosophies with 3D printing. One is you move the > extruder motor around with additional mass and vibration for short > motors. The other is the Bordon tube where the motors push through the > feed tube. > > Vibration verses a certain amount of flex in the supply tube that then > results in spring tension. So when you don't want to print you have > to retract much further or it oozes out as the Bordon tube relaxes. > Then when it's time to extrude the first bit of filament flexes the > tube again before it starts applying pressure into the nozzle. > > The other major problem with mine, which others have fixed and I still > need to, is as the extruder moves up it vibrates the sides. Others > have built extensive bracing holding the top solid in 3 dimensions so > it cannot move. > > One friend changed to a higher end unit and hasn't looked back. I'll > ask him what he bought. > > I expect garbage from my 3D printer so if I get something that looks > half decently nice I'm pleasantly surprised. So it's all about > expectations and mine are much lower than most. > > For example I printed this from 4 pieces and glued it together so I > could see what the final version would look like and if I had fit > issues. LinuxCNC has no trouble driving the STMBL to turn this. > http://www.autoartisans.com/mill/HarmonicDrive/FullSize-6.jpg > > Then I went back to the CAD system and expanded for shrinkage and > added fillets etc to be able to make a pattern. Still in 4 pieces. > > http://www.autoartisans.com/mill/HarmonicDrive/PrintedPattern.jpg > > A bit of body filler > http://www.autoartisans.com/mill/HarmonicDrive/PatternPrep-1.jpg > primer > http://www.autoartisans.com/mill/HarmonicDrive/PatternPrep-2.jpg > and paint > http://www.autoartisans.com/mill/HarmonicDrive/PatternPrep-3.jpg > and then a test ramming into a crucible while I continued with > building a crucible capable of holding 15 lbs of aluminium. > http://www.autoartisans.com/mill/HarmonicDrive/Pulled-1.jpg > > And then there were these. > http://www.autoartisans.com/images/HeartsInGym2.jpg > > I printed 300 clips that held the GE-35 RGB Christmas lights in the > heart frames. The hearts showed a gold colour with random twinkles in > white (like silver sparkles). On the far left is a small box with 50 > LEDs in the same pattern and an ESTOP button modified to not have the > latch. Press the button and all 6 hearts changed to a pulsating RED > in the rhythm of a heart beat. bmp BMP, bmp BMP... for about 40 > seconds. Time for the bride and groom to find each other and kiss. > Like tinkling glasses during dinner. > > Then back to gold with white sparkles. The hearts themselves were > 1/8" mahogany stiffened with frames for hanging and covered in gold > mylar. I now really dislike spray glue... > > 3D printing is great where you can't do something any other way. What > I have found though is it's like a drug. The end result people become > like someone who only owns a hammer and everything looks like a nail. > > John Dammeyer
There is that too. I went back to check on it, and from the evidence. the heat of the motor wasn't excessive. But the motor shaft has spun itself loose in the bearing carrier. So the motor was still spinning buteverything was motionless. Now I take it apart to verify since this model has no portholes to see into it. Sigh... Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
