There is a lot more electrical noise in CNC machine, mostly because of the motor spindle. They must have a reliable ESTOP, and they can't be set up in such a way that an uncommanded move could occur on power up , so they generally require a charge pump. When big CNC machines so something you don't expect the results can be quite dramatic. Real time jogging is important, multiple coordinate systemby Polygonhell - Developers
The edges not touching and the not onus round edges is because there is some backlash in at least one of your X/Y axis. I would check your belt tension, and that the sett screws on the pulleys are tight.by Polygonhell - General
If you go that route you'll also need a temperature controller (2 if you want a heated bed). The original H1 from SeeMeCNC used Mach as a driver (some people used EMC2) using a separate temperature controller, it can certainly be done. It's nothing like as convenient as any of the arduino based solutions and you buy the low end boards for similar cost.by Polygonhell - Developers
The STM supplies an IDE for their chips and it doesn't require any sort of JTAG, which is nice. I think you'll find the 20K of RAM on that particular board restrictive. I've been using one of these Which is similar, though different chip and it has more flash and RAM, and ethernet, which to me is a minimum requirement for me to be bothered to rewrite firmware. I've been writing my own firmware,by Polygonhell - General
nophead Wrote: ------------------------------------------------------- > How can Plastic be reliable? > > One of the most important properties is how > consistent the diameter is. A lot of companies > quote +-10%, but that is nowhere near acceptable > for FFF. It needs to be 3.0 +=/- 0.1mm. All the > "3mm" filament I have bought from USA has been > about 2.8mm for some rby Polygonhell - General
Basically you power on the machine, you jog to 0 in each axis and enter G92 X0 Y0 Z0 which resets the coordinate system.by Polygonhell - Reprappers
You don't technically "NEED" endstops, but they make life a hell of a lot nicer. Without them you have to manually reference 0,0,0 using G92 every time you power on or reset the printer. I ran my first printer without endstops, but I wouldn't do it again.by Polygonhell - Reprappers
You have some backlash, which is why the circles aren't round, and that's probably at least a contributing factor in the infill not nearing the edges. Check your pulleys and belts.by Polygonhell - Reprappers
QuoteThe thermistor is an EPCOS - B57560G104F rated beta is 4036K - What temps are you printing at? I'm at 235, but I need to verify I get the same issues reducing the temperature (inconsistent extrusion) as I did before I changed the retract settings. I've had Ultimachine PLA before that requires 230 to print consistently, and I haven't tried this color before, so it may just be par for the coby Polygonhell - General
QuoteGlad to hear you are up and getting nice prints! Any pictures? This is in ABS almost no messing with parameters, buddha at 50% scale This is one of MANY PLA calibration objects And a test print - pink panther woman at 50% scale Excluding the single wall test all at 0.2mm layer height, 2 Perimeters (out to in) 20% infill, 60mm/s perimeters and 100mm/s infill, 10s Minimum layer time.by Polygonhell - General
QuoteThose symptoms really do sound quite bowden related, and I would indeed take a look at your retraction settings. Intermittent extrusion at low speed could be stiction induced stick-slip type motion induced by friction in the tubing or anywhere else in the filament path OK I am now getting good PLA prints, actually very good PLA prints. The stiction is in the hotend, I know this because itby Polygonhell - General
And a follow up. If you're not printing PLA I have to say this hotend is REALLY nice, and I wouldn't hesitate to recommend it, it produced one of the nicest ABS prints I've seen off my printer. The replacement will print PLA reliably I ran about 9 50% sized buddha models (in 2 different PLAs) through it yesterday, I still have some issues with PLA, notably I see a small gap at the start of eachby Polygonhell - General
Quote1) How can I disconnect the temperature function completely? I don’t need it for a cement In Marlin and repetier there is an unused thermistor type, that will prevent all the temperature checking, it's 0 in Repetier, and either 0 or -1 in Marlin. I would assume Sprinter has something similar.by Polygonhell - General
Just wanted to say I just received my replacement parts from E3D, the package was sent airmail, I'm going to put it together and test it this weekend, I'll follow up then.by Polygonhell - General
What are you trying to cut? If you're milling PCB's it's not an issue. If you wants to cut metal, understand there is a huge difference in stiffness between even the stiffest repraps and even a toy mill.by Polygonhell - General
Three ways usually one of Hand written Macros or plugins like the Mach3 wizards CAM software The later for anything complicated, there are many options most of them for extreme amounts of money, if you think commercial CAD is expensive, CAM is even more expensive. But for most simple 2.5D operations there are plenty of free options.by Polygonhell - General
There are a lot of convenience functions missing from the RAMPS gcode interpreter. No support for multiple coordinate systems being the primary one you'll miss with milling. The other one that would drive me nuts is the crappy jogging controls. I run Mach3 on my mill to a parallel port break out board (though I have a smooth stepper sitting around here I keep meaning to install) driving the steby Polygonhell - General
The original SeeMeCNC extruder has 2 driving rollers. Though the issue with that hot end for me has always been the extremely shallow pattern on the driver rollers.by Polygonhell - Developers
I assume he's trying to drive 2 motors from one set of step/dir/en signals, so the motor outputs would go to separate motors. In which case it AFAICS ought to be fine, you're just splitting the logic signals.by Polygonhell - Controllers
Mines entirely vertical offset by 0.5 of the groove spacing. Though the exact offset doesn't seem to matter as long as it's close, I let the idler "float" vertically but I'm using an M4 screw as the shaft with two 684 bearings in the center and it seems to stay pretty much stay where I put it (On a smooth shaft I'd expect it to self center). As to force before it slips, anecdotally the version wby Polygonhell - Developers
matty2013 Wrote: \> Did you get a tracking number? I got one and I can > see that I should have it by the end of the week. > It shipped last Tuesday and I'm in Canada No tracking number, and no communication since Sanjay contacted me to get my name and address.by Polygonhell - General
QuoteStill nothing arrived in the post yet?! Something may have gone wrong in my communications with getting your spares shipped by the guy that does the shipping. I just checked my mail box, and I've still received nothing,by Polygonhell - General
You might be right, obviously any runout will result in changing tension as the idler and drive roller rotate. If I get a chance I'll print some plastic parts this week and test them.by Polygonhell - Developers
Thee friction seems to be adequate, I'm currently basing that on how much force is needed to make the filament slip. The 60 degree machined groove might also be helping with the friction. I think you have to minimally support the idler on bearings because of the tension on the line, without them I think it will just bind, the pulleys ought to be printable though, none of the dimensions are particby Polygonhell - Developers
Some work towards prototype number 4. Just a prototype for the new filament drive, more details on my blog.by Polygonhell - Developers
aduy Wrote: ------------------------------------------------------- > I have to say, the corexy is excellent for keeping > that bar perpendicular, by increasing the tension > on the belt you can correct the angle of the bar > if it does happen to be off. also its rock solid, > the trick however is getting the belts to cross > over, and of course finding long enough belt. I wasby Polygonhell - General
I don't see how they put out what they are showing for the price they are discussing. The XY stage they show uses 3 carriage and rail bearings, even sourcing from China in quantity those are about $40 a piece. They are throwing in a raspberry Pi as part of their electronics solution. So my assumption would be that they intend to make the money on the consumables. Or they intend to change the deby Polygonhell - General
You do realize that for at least older versions of Marlin only G28 works to home, you can't home individual axis?by Polygonhell - General
If you use M119 to check the status of the endstops, then press each switch manually and execute M119 do the results look good? What electronics are you using?by Polygonhell - General