Enlarged Rostock by kolergy. Brutal review of the Rostock Max. What do you think ? I'm also in that camp that says much of the review is factually wrong; I soldered the leads to my Onyx with a little Weller WESD-51 with the smallest tip and not even at full temp.
He doesn't seem to have much experience with soldering. And my Onyx is plenty flat, so I have to think his was damaged in shipping or he didn't get the top side of the connections flat, to where it bends his glass plate. He has a fan, but it's pointing toward the back side of the circuit board, away from the chips; that's certainly not helping much. Plus, he mentions a need to disconnect the stepper motor to move the extruder gears, but this is something you can easily do in software.
I don't see how it's possible to wear acetal so quickly on smooth aluminum without having completely overtorqued the thing. But I'll give him some credit, the end stop, tensioner and extruder designs could certainly be made simpler and more reliable. -b - tekst uit het oorspronkelijke bericht weergeven - Holy cow, that's rough. Billy D's Rostock 3D Printer: Minor mods to Rostock. Hi All, Just thought I would post some minor updates that I made to my original Rostock.
Drew's Rostock: The quest for perfect prints continued. First layer adhesion seems to be the key to getting a good print out of this printer.
If the first layer sticks evenly and consistently, and stays stuck during the print, the print usually comes out well. If the corners detach, they tend to curl upwards, deforming the part, and in the worst case interfering with the movement of the print head. When a delta printer skips a step, it doesn't just shift the layers above the skipped point sideways as it would in a normal printer. A skipped step on a Rostock printer both shifts and rotates the layers above the skip, often resulting in the head crashing into the print again resulting in more skips and a completely ruined part. My printer was not printing well. One tip I'd read on the message lists was to paint the borosilicate glass with a diluted mixture of PVA glue in water. This almost worked too well - parts became very difficult to remove, to the point where I was worried about damaging the glass when trying to get the parts off.
Rostock Prisma by JorgeRdgz. A derivative of Johann's Rostock but using 80/20 1010 T-Slotted aluminum instead of smooth SS rods.
The extruded aluminum provide support for the prism structure. Video: youtu.be/STc54aOQdK4 The goal for my derivative of the Johann’s Rostock was to build a simpler, lighter and more robust structure. I decided to use extruded aluminum since it’s quite strong, readily available, and relatively inexpensive. A piece of 80/20 10 SERIES 1010 1" X 1" T-SLOTTED EXTRUSION x 72" (1828.8mm) sells for $19 in Amazon.com. Gone are all the wood parts, and the stainless steel rods. Rostock MAX. Rostock MAX Release status: working Assembly Instructions/Manual including LCD setup Many many thanks to user:geneb for generating an awesome, easy to use set of instructions!
[Rostock MAX Assembly Manual, 2nd Edition] created, maintained and updated by user:geneb from SeeMeCNC Forums. IMG_20130216_125338. Rostock MAX. Rostock MAX Release status: working Assembly Instructions/Manual including LCD setup Many many thanks to user:geneb for generating an awesome, easy to use set of instructions! [Rostock MAX Assembly Manual, 2nd Edition] created, maintained and updated by user:geneb from SeeMeCNC Forums. Johann C. Rocholl's Photostream. Bill Of Materials - Rostock. Large format Kossel? Delta Variable Resolution Fix Brainstorming - Google Groupes. Step size = 1 / steps per mm For a 20 tooth GT2 pulley and 1.8° stepper motor with 1/16 microstepping this is 80 steps per mm or 0.0125mm/step So the maximum error due to stepper resolution on the standard Rostock design is 0.015mm or 15 microns.
The reality is there are several other sources of position error that will be at least 20 times larger than this. So it’s pretty safe to say that any errors due to the resolution of the stepper motors are completely insignificant. Regards, Mike Paauwe From: delt... What's your definition of step size? On Thursday, March 14, 2013 3:59:59 PM UTC-5, Michael Paauwe wrote: 0.87 is sqrt(3)/2 and is the distance from the corner of a unit cube to the center. The maximum position error for a cartesian 3-axis robot with equal step sizes on all 3 axes is 0.87 x step size. 3D Printing Parts — Rostock 3D Printer!
Part 5 Arms and Carriage - Mechanical Assy of SeeMeCNC Rostock MAX. Rostock (delta robot 3D printer) by Johann. Rostock rep rap wiki.