QuoteThat being said, I can imagine (don't take my word for it!) slicing involves looking for intersections between the surface triangles of the model and a X/Y-plane. To limit the amount of triangles you have to check, you can index them according to their vertices' positions. At least this is the approach I would be choosing. Unfortunately that's the easy bit of the problem. Once you have theby Polygonhell - Developers
Yes I haven't seen my replacement parts yet either. People do seem to be receiving hotends from the second order now, so I was going to give it a week or so given mine has to make it to the west coast of the US.by Polygonhell - General
Have you adjusted the trim pots on the stepper drivers, if the current is too high or too low it can cause an issue.by Polygonhell - General
I assume it's screw driven from the large steps/unit. If the stepper is not enabled or better disconnected, how hard is it to turn the screws? You don't mention what drivers you are using, If they are still stalling, either they are not providing enough torque possibly because of mechanical issues, or too low a torque setting on the driver, or the driver is overheating.by Polygonhell - General
You will probably have to greatly reduce you XYJerk and accelleration settings. With a steps/unit that high you are asking the motor start spinning way too fast and that is likely stalling the motor.by Polygonhell - General
It looks very much like Z wobble to me, hold the print up to the Z screw and see if the spacing matched the screw pitch, it most likely will. The A0-101 still has Igus bushings on the Z axis? I used the same bushings on my Mendel Max for a while, and could not get rid of the ZWobble I had, the bushings are self aligning, and seem to be pre-disposed to moving with any wobble in the screw. I triedby Polygonhell - General
It's probably that D is way too high. Try increasing P slightly and decrease D by about 1/2 to start with.by Polygonhell - Firmware - mainstream and related support
I have some parts here for a 4th prototype, but I'm working on a couple of other projects at the moment. I would suggest going straight to CoreXY unless you have someway to make a very stiff XY gantry where the racking forces won't be significant. The larger the XY area gets the harder to achieve this is. The line is very slick and really doesn't like holding knots and tying a knot in it with tenby Polygonhell - Developers
QuotePS: its not just a missing Step wich causes the Problems. Most Sepper motors got 5-10% position inaccuracy per Step, thats what causes the Problems. While this maybe true, it doesn't accumulate, if it can run one complete revolution without issues, positional accuracy will never be an issue. Given this is exactly how the Z axis on the majority of repraps work I can't see it being an issue.by Polygonhell - General
> Just a thought - when looking at PolygonHell's > blog photos, and also thinking about the PLA ring > in the gap issue - are your nozzles tightened up > hard into the heater block with the > hexagonal-flat-portion of the nozzle hard against > the heater-block? Or does the nozzle butt up > against the stainless steel break inside the block > and have a small gap between thby Polygonhell - General
It probably uses a 4988 driver chip or similar and they are rated from 8-35V. Most of the Chinese sourced switching mode PSU's have trim pots that let you adjust the voltage by about 2V in either direction.by Polygonhell - General
Is it just the extruder or also the axis motion. The Marlin delta code does have an issue where for slow moves it tends to jerk horribly because it generates way too many small segments, and I think the motor interrupt starves the other processing. But this affects all of the axis not just the extruder. Repetier also has a similar issue, but it's much harder to trigger. In general the delta suppoby Polygonhell - Firmware - mainstream and related support
Repetier has support for the MAX6675, but if your trying to keep this simple, you'd probably be better of with megatronics instead of Ramps, it has thermocouple support on the board. If your new to all of this I'd strongly recommend starting with something you know works, there is more than enough to debug on the average build without adding in untested electronics.by Polygonhell - General
What Hotend are you using? I run a fan on the thermal break all the time, and just let it cool down before killing the power. Recently I've been using Repetiers extruder fan control that runs the fan both when heating the extruder and anytime the thermistor reads over 50C, but prior to that I just connected the fan directly to 12V. Before I started experimenting with a new Hotend I hadn't had aby Polygonhell - General
You'll need additional electronics to use a thermocouple with Ramps. It's simple enough, basically one of the chips designed specifically for therocouples, some firmwares haves support for one or more of these chips. As to supporting combinations of thermocouples and thermistors I'd have to look at the firmware source code.by Polygonhell - General
What firmware are you using, Repetier at least has a bug in it, the steps/mm must be set correctly both in configuration.h AND in the EEPROM settings. If they do not match you get weird motion, the issue is that the actual delta calculation uses constants derived from the configuration.h settings, but the motor motion is based on the EEPROM values.by Polygonhell - Delta Machines
Are you printing PLA or ABS. You should check the temperature with a thermocouple on a meter. If you are printing PLA, you're printing very hot which will make jamming more common. You can get away with just pointing a house fan or spare case fan at the print, it really doesn't take a lot of cooling, but you need to heat the nozzle inside the airstream. Again the fan thing only applies to PLA.by Polygonhell - Printing
You don't say what firmware you are running, usually t he issue is that EEPROM is enabled, after the first time the firmware is loaded subsequent downloads will load the values from there instead of the values you set in configuration.h. Depending on the firmware you can set the values with MCodes, or in repetiers case there is a dialog box in repetier host to change the values. You can also justby Polygonhell - General
I believe the G3D variant is particularly bad but even the lulzbot buddaschnozzle requires some air flowing over the heatsink to reliably print PLA.by Polygonhell - Printing
I spent some time looking at various ARM solutions, both microcontrollers and microprocessors. I think linux is the wrong platform for a motor controller, but if you did go that way I don't understand the obsession with the RPi, there are similarly priced boards that are better suited and if it came to it doing a small production run of a 100 or so boards isn't prohibitively expensive. BeagleBoarby Polygonhell - General
Quick update for Sanjay, I did get a chance to reassemble my hotend for the 3rd time. I ran a 2mm drill bit through it on my lathe before doing so, I didn't notice any obvious burs or similar in doing so, I also ran an M6 thread through the threads of the heater block to makes sure they were clean. I've spent a few days trying different strategies, increasing speeds, various retraction settings,by Polygonhell - General
QuoteI guess my theory with my problem of bonding ( or lack of it) every 10th layer or so was an accumulative error or something along those lines. How is a request for a "partial" micro step dealt with? Is it ignored? Rounded up or down? Buffered then adjusted at some stage ( layer) in the future? The Firmware converts requested positions to steps and tracks those internally, since all requestby Polygonhell - Printing
utilitybee Wrote: ------------------------------------------------------- > Is it possible to use a mono-stable 555 timer ic > circuit to extend the pulse with hardware if > software is not possible? The later Repetier Firmwares have a pulse delay option in the firmware, I haven't looked at recent Marlin releases.by Polygonhell - Printing
I should point out that one of the reasons that the Onyx is so expensive is you pay for printed circuit boards by the square cm (raw board area), and it probably needs 3x the board space of a Mk1 or Mk2 bed.by Polygonhell - Delta Machines
Edit just realized I'd already responded with something similar earlier in the threadby Polygonhell - General
Yes that was the one. It was a nicely put together kit, I wouldn't personally assemble it exactly like he does, but it's very complete.by Polygonhell - Delta Machines
My 2c and I own both printers. Many may disagree with me, but if you are not familiar with adjusting a 3D printer to get quality results, there are enough additional challenges getting a Rostock style design dialied in that I'd recommend the Mendel Max for a first time builder. On the Mendel Max You can certainly do cheaper that the one you'r looking at, a friend of mine bought from a vendor on tby Polygonhell - Delta Machines
Trinity labs have a couple of round Kapton film heaters, the larger one requires 24V though.by Polygonhell - Delta Machines
If the bed resistance is marginal the fuse will cut off without cooling on the fuse, I have one heated bed that's like this, what's the resistance of the bed?by Polygonhell - RAMPS Electronics
QuoteCheers for the additional info, all helps! Any idea what the diameters are? (See nopheads post) According to my micrometer it's pretty much 1.70 plus or minus 0.01 The Ultimachine stuff is pretty much spot on 1.75 with about the same variance.by Polygonhell - General