Show all posts by user
Here's what I made, here's a photo, and here's a link to the [[page]] on RepRaps wiki!
Re: My coreXY design is progressing to the build stage - 7 years ago
Quotedc42 Why not just use finer pitch leadscrews?Because he's not using leadscrews at all?by Mikk36 - CoreXY Machines
Re: My coreXY design is progressing to the build stage - 7 years ago
Quotethe_digital_dentistAfter letting it run up and down for the last hour, the motor and driver chip are both just warm.A stepper motor will, if anything, cool down when in motion instead of heating up thanks to less constant current flowing through the coils.by Mikk36 - CoreXY Machines
Re: CoreXYNZ build - 7 years ago
Why are you measuring stepper driver current in capacity?by Mikk36 - CoreXY Machines
Re: Extra large D-Bot almost done 380x380x500 - 7 years ago
Looks like just a bolt and nut locking it in by friction.by Mikk36 - CoreXY Machines
Re: Marlin won't move Z axis - 7 years ago
If it won't move during prints, can you try moving it really slowly manually? For example, over the Serial interface over USB with OctoPrint, Pronterface or similar? If it does move, then indeed, you have to just limit to how fast it can go (with testing to see how fast it can reach). In addition to the top speed, it can be the acceleration of the Z axis, which can be the limiting factor as to hoby Mikk36 - CoreXY Machines
Re: HELP - 7 years ago
If you think your thermistor is broken, measure it with a multimeter for resistance.by Mikk36 - CoreXY Machines
Re: Rectangular build space: X axis on the long or short side? - 7 years ago
Long supported Y axis would be my pick.by Mikk36 - CoreXY Machines
Re: G&C Printer [Metal Upgrade] - 7 years ago
You could try removing the top mount of the leadscrew.by Mikk36 - CoreXY Machines
Re: FuseBox ~$300 CoreXY Printer - 8 years ago
QuoteFA-MASThe other wire should go to the Not Connected, usually labeled NC on the switchNC and NO mean Normally Closed and Normally Open. Normally Closed means that if you're not pushing the switch, it has a connection between NC and C (Common). Normally Open behaves as the opposite to that: You push the switch to get a connection between NO and C.by Mikk36 - CoreXY Machines
Re: criss-cross pattern needed? - 8 years ago
One flaw that I see with your design is that as you tighten the X belt you will put a constant sideways (tilting) load on the X axis and with that on the Y movement system creating additional resistance and wear. This could be mitigated by having the Y motor also drive the left side of the X axis (through a shaft, for example, think Ultimaker) or having another motor there.by Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
That's a good point about adjustability with the normal ones. The bed is 340x340 and will have a 300x300 silicone heater. I'm assuming that that 20 mm gap won't be an issue thanks to the bed being 8 mm thick.by Mikk36 - CoreXY Machines
Re: Mechanical End Stop Wiring Issue Mks 1.4 Board - 8 years ago
On the board it has the connections labeled as + - S. This means: positive voltage (normally 5 volts), ground and signal. Your endstops don't require power, so you can ignore the + pin. You end up with - and S and since it's just a dumb momentary switch, it doesn't matter which pin you connect to which end of your microswitch.by Mikk36 - Extruded Aluminum Frames
Re: Yet another CoreXY printer - 8 years ago
Also am pondering a bit on using countersunk screws on the effector platform to attach the plate to the blocks to get a flush finish. The screw spec says 1.9 mm length for the countersunk head, plate itself is 3 mm.by Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
Quoten8bot Very cool. Are those misumi high-temp miniature linear guides I spot? Just el-cheapo MGN12 rails with MGN12C blocks. Quotecozmicray Six bolts holding ballscrew nut. Please allow this to float, at least until all rails and ball screws are lined up. If locked down, it will bind X, Y All it has to be --- is accurate mover for Z Noted, will reevaluate amount of screws on assembly andby Mikk36 - CoreXY Machines
Re: CoreXYNZ build - 8 years ago
Quotecozmicray I don't understand? All these great milled brackets and Motor mounts of a piece of 2020 with 1 corner bracket? Idler pulley mounts -- a piece of 2020 with 1 corner bracket? Maybe a triangular brace on side? Weak points like these make super machined brackets ---- useless and system wobbly? From what I understand, the vertical extrusions behind the motors and idlers will be atby Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
Anyway, some progress with the effector platform:by Mikk36 - CoreXY Machines
Re: Idler pulleys with spacers between their bearings..??? - 8 years ago
Quotethe_digital_dentist I run the tooth side of GT2 belt on a smooth pulley made from stacked bearings (F625zz IRIC, 16 mm dia) in the X axis of my printer. I see no difference between the X parallel surface of prints and the Y parallel surface that is driven by a precision ground ball screw. SDP/SI says smooth pulleys in contact with belt teeth should have equivalent 40 tooth pulley diameteby Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
Can I flip this ball screw nut or are there any complications/downsides with this? I'm aware that I need something to hold the balls to the ballscrew while I'm flipping it in order to prevent them from falling away. That's no issue, I can just print a placeholder plastic ball screw or whatever to roll the nut onto for flipping it.by Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
What do you mean by headroom for filament feed? Anyway, since I haven't ordered any extrusions yet and I haven't designed the extruders/hotends into it yet, I haven't also set the height of the printer in stone. I'm currently leaning towards 2x E3D v6 + Titan combos. As for general design: it's been a hard goal to keep everything inside the frame while not wasting too much space. Looking at digby Mikk36 - CoreXY Machines
Re: Yet another CoreXY printer - 8 years ago
Already have 6 rails available, so no point making it any weaker, they're MGN12-series. I also did not want to have any big mass swinging on just a single rail (think of 2 direct extruders, for example). I left the top of the ballscrews open intentionally to leave all the alignment to the two vertical linear guides running on the front extrusions and have the ballscrews only deal with Z axis. Iby Mikk36 - CoreXY Machines
Yet another CoreXY printer - 8 years ago
So, here I am in the middle of designing myself a new printer. Currently I have a large-ish kossel-style delta printer, but I'm not that happy with it because I can reliably print only PLA, because it's, well, open. It does have a heated bed, but anything larger than tiny things in ABS tend to warp really easily, so the plan is to make myself a new printer, that is to be enclosed and a CoreXY seeby Mikk36 - CoreXY Machines
Re: Hot End on Extruder - 8 years ago
Would propably be a good idea to look at the RAMPS schematic.by Mikk36 - General
Re: Recommended CoreXY for newbie? - 8 years ago
QuotewbwingEver since I read "Son of MegaMax", all I see are flaws.Yeah! Thanks, digital dentist.by Mikk36 - CoreXY Machines
Re: Chunks of glass stuck to heated bed. TOO MUCH BED ADHESION!! - 8 years ago
Quotethe_digital_dentist I've occasionally had problems with prints sticking too well, but I have yet to see one take chunks out of my cast aluminum print bed...And propably never will, because aluminium isn't brittle like glass.by Mikk36 - General
Re: Water cooled extruder - 8 years ago
Does the pumping action have any effects on the printing quality?by Mikk36 - Developers
Re: Voron 3D printer uses just one bearing per XRod... is that a smart choice? - 8 years ago
QuoteLarsKTotally ignoring that; This picture is of a part I made with a hotend that could really wobble, it is my believe that the deep lines you see of a single layer offset is a consequence of this. As long as the nozzle makes the same movement all the time it is displaced the same. For this reason part of the print looks OK. Then when it moves from one contour to another it "resettles" and geby Mikk36 - CoreXY Machines
Re: Pulley Spacers - 8 years ago
Couldn't you get some cheap aluminium tube in the right size and cut it to length?by Mikk36 - Mechanics
Re: G-Code settings - 8 years ago
Then your firmware is doing something wrong. It should not extrude anything if it isn't commanded to (with the E parameter).by Mikk36 - Slic3r
Re: Printtable - 8 years ago
True for any system that uses a direct extruder. There are both upsides and downsides to that. The bowden system isn't without its downsides.by Mikk36 - General New Machines Topics