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Printing issues ...
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Can't you simply disable them outside of homing sequence?
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sigxcpu
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Reprappers
@o_lampe: I would really like a software feature that creates belt lengths out of thin air
by
sigxcpu
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CoreXY Machines
@Origamb: direct extruder or Bowden? I'm asking because anything under 2mm is stringy (let's not talk about PET-G )
by
sigxcpu
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General
It's easy to understand why you need parallel belt to movement direction. In your picture move the X carriage up and compute the belt length. Move it down and compute the belt length again.
Another way to look at it:
- the movement axis is a side of a triangle S1
- the belt is the hypotenuse of the triangle I
- the distance from the motor shaft to the movement path is the other side of the tria
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sigxcpu
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CoreXY Machines
Why would you need a gearbox for Z? If you use common 20T pulleys on motors and some big 60T on Z ballscrews you get a 3:1 "gearbox". For 16T motor pulleys, even bigger ratio.
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sigxcpu
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CoreXY Machines
My MKS Base 1.4 had weak solder point on both green sockets (power & bed). When playing with the screws, they move a little and the socket terminals get loose in the PCB. Found that using a thermo camera wondering why the sockets and the first 4-5cm of wires had 55 degrees C compared to 30 degrees for the rest of the wire.
So get cheap soldering iron, new sockets (they are called screw termin
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sigxcpu
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Printing
Does it start when you turn on the printer without explicitly enabling it?
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sigxcpu
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Printing
I'm watching closely your build and stealed and adapted some ideas for my attempt at at a CoreXY.
Anyway, one noticeable thing I want to thank you for:
This is a 320x320x8mm cast aluminium, milled flat with a 600w 300x300mm silicone heater under it, no enclosure yet.
Target temp was 115 deg. C, so not far off. I've made a custom thermistor location.
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sigxcpu
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CoreXY Machines
Nope. Firmware is not aware of the voltage.
by
sigxcpu
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Reprappers
I've tested mine and it works.
- motors are fine (they are current controlled and rated for 2-3V anyway )
- 24V heatbed is needed (otherwise the current will be too high for the controlling MOSFET)
- 24V hotend is needed (the temp control loop may not be able to handle the quick swings and things can go bad. Also, the wires may be not rated for 2x the current)
- you will need 24V fans everywher
by
sigxcpu
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Reprappers
You also have backlash (top left "corner") , that can be the cause of the infill not being stuck to perimeter.
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sigxcpu
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Printing
I would build another printer and keep this one as is. Prints look amazing.
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sigxcpu
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Printing
@dc42: if I'm not mistaken, in the datasheet "Figure 7 Transfer Characteristics" says that 5V gate voltage is enough for 120A.
Anyway, if somebody could get a (I think Chinese?) Vanguard MOSFET (used in MKS BASE controller) it is simply amazing. I can provide the model number on my board if interested, but I cannot find it to buy it.
By "amazing" I want to say that the FLIR camera shows the temp
by
sigxcpu
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General
Did you try to start the fan on that area only? Event manually starting it will do it. I don't know about other reasons, but thin areas like this curl because of high temperatures.
This is an example:
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sigxcpu
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Printing
Yes, it is good if you have no other mean to allow layer cooling. You need to find means to allow plastic too cool and stabilize before the hotend comes and deposits the next layer on top of it.
A layer fan with ABS is not a 0/1 problem. If you cool too fast, it will shrink fast and delaminate. If you don't cool (active or passive) you will put hot plastic over hot plastic. It also depends on th
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sigxcpu
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Printing
You need a layer fan or layer minimum time (reduced speed) or print more at once to allow cooling time.
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sigxcpu
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Printing
Use Repetier Server or another G-code sender that has support for acceleration in formulas. Acceleration and Jerk play a big role in computing print time.
by
sigxcpu
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Reprappers
I cannot do print quality checks yet because this is more or less a mock-up. It doesn't even have a Z axis and it torques like hell (H-bot). I've ordered the laser cuts yesterday so it will take a while until I finish the thing.
I do have vibration dampers on my Prusa i3 and I didn't see an issue with them. I do have issues but backlash (which I would expect from dampers torque if any) is not on
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sigxcpu
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CoreXY Machines
I don't understand reprap.me issue. First, I think the warranty should be 2 years in EU. Second, why paying almost 2x the price when you can get the same "warranty" from aliexpress much cheaper?
When I buy stuff locally (in RO or EU) I do it for the warranty, or the chance to touch it and play with it (linear rails/guides for example).
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sigxcpu
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CoreXY Machines
I think the circuitry to switch the motors and the software changes are harder to implement than a second extruder driver wiring.
by
sigxcpu
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Developers
Please disregard "the design". It is a mock-up, not CoreXY, but a (very ugly) H-bot.
I've posted this to see the difference without and with motor dampers (Astrosyn, I think, taken from an old Xerox copier).
Without:
With:
I was impressed by the difference, because I didn't see the same amount in my P3 Steel. Maybe because the motor mounts are more (X) or less (Y) printed and the plastic is
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sigxcpu
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CoreXY Machines
try to make that cube bigger and use infill, not hollow.
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sigxcpu
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Printing
If you want a build plate that does wonders, you can try Polycarbonate (clear). Like the expensive one you've got, I didn't manage to pull of parts without breaking. Perfect adhesion! You use your part with the printbed
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sigxcpu
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Printing
For future reference: MKS BASE has its LCD pins reversed in ribbon (or some LCDs do?). This was my case and others (that I got the idea from).
by
sigxcpu
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General
Quotebme
@bme: again, sorry to hijack your thread.
No problem at all!
I work more with mechanical design like now some tests with 0.8 mm layer height.
It is very difficult to cool such amount of PLA.
Lower the speed or increase the minimum layer time in slic3r and blast the fans. Except needle-like features, I always get away with that.
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sigxcpu
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Reprappers
You are assuming that we connect our computers to the board, which is not always the case. As far as I've read people are preferring SD cards or embedded computers (my case) to control various printers and CNCs.
by
sigxcpu
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Reprappers
Thanks for the Github issue posted. I've tried again today to configure the firmware and I have another observation to make: specify units everywhere in the config tool. I've needed the RepRap wiki page to understand what does the config tool wants from me for "maximum feedrate" (mm/min), "endstop clearance" (microns), "travel limits" (mm/sec?), search feedrate (mm/min?), "acceleration' (mm/s^2?)
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sigxcpu
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Reprappers
I know about Teacup, I've looked it a little, but now that you've opened the topic, here's what I would do if I were you:
- we (me?) are spoiled by graphical LCDs. I'm using Repetier firmware right now and I like the tons of information in the primary screen and the myriad of settings and menus without G-codes or re-uploading the firmware. Does Teacup have that?
- The config tool is cumbersome a
by
sigxcpu
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Reprappers
It is not about signals. For starters some/all of the 32-bit CPUs have hardware floating point units. All the motion in a 3d printer (except Teacup firmware) is computed in floating point, so the performance gain is significant. You feel then when you have tons of little segments (e.g. circles). 300mm/s are reachable, if ever, on long, straight lines only. Even then, at 80 steps/mm which is the u
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sigxcpu
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Reprappers
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Pages: 123