Extruder is powered off of a different power input than the heated bed. IIRC the heated bed is the only thing that is connected to the 2nd power input. Check to make sure that you have power with the 2nd input. Presuming you have power there, check the fuses. You may also have fried your MOSFET transistor, especially if you didn't have a heat sink and/or fan cooling it.by cdru - RAMPS Electronics
One-stop shopping, fast delivery, cheap as possible...choose 2. That's coming from China, so the quality of what you're getting may be decent/good, or you could be getting cheap knockoffs. It will also take some time getting here...plan on 2 weeks minimum possibly even longer as there's going to be a back log of shipments due to the Chinese New Year wrapping up. Finding reviews from previous cby cdru - RAMPS Electronics
I think it's a shady practice to severely inflate the shipping costs in order to advertise a lower actual purchase price. It's a method to avoid having to pay ebay fees while still making the same amount. Domestic shipping for that item is 7.30 USD which is ridiculous.by cdru - General
I wouldn't worry about where min and max are. Plug in your Arduino without 12V on and set your Vref to the correct computed voltage based on your steppers. Once that's set you can tweak them a little based on that point. I'd think the only time where knowing where the min or max point would be if you have unknown steppers and you were just starting low and slowly turning the drivers up until thby cdru - RAMPS Electronics
I found it easier to just tap the alumnium tube and not worry about the nuts.by cdru - Mendel90
Quotedissidenceborosilicate (aka pyrex) was made to be much more shock tolerent than normal glass, it is the type of glass used in cook wear and i think a good chunk of lab glass.Most Pyrex that's made in the US hasn't been made of borosilicate glass since most of the industry switched sometime in the 80s, instead using cheaper and slightly less strong soda lime glass. And it's definitely been tby cdru - General
It would seem you're potentially addressing one issue by signifiantly increasing the complexity of the system requiring additional electronics and synchronizing the two different types of motors, and in the process defeating the purpose of the bowden tube setup.by cdru - Mechanics
QuoteJerms.a320 On my PSU there are only 4 wires coming off the second "rail", and 8 from the first rail I am using RAMPS 1.4 , I had a crack at measuring the resistance between the rails and got 0.00 Ohms - should I just use 6 wires to the two inputs on the RAMPS board ?I'd just split them, one rail to one set of inputs, the other rail to the other set of inputs. I wouldn't get too caught upby cdru - Mendel90
QuoteJerms.a320 Is it alright to use a combination of 12v - 1 and 12v - 2 lines together ? - my power supply is/was modular (I got it free from a friend) and I have only 5 full length 12v 1 wires It really depends on the design of the supply. Some work fine. Some don't. It can be hard on the supply though as the rails may be regulated separately. Which electronics are you using? Melzi I beleivby cdru - Mendel90
Quotechngyianwow, I don't think you are suppose to turn the trimpots by that much. they are not suppose to turn more than 360 degrees, you may have already killed it.It depends on the pot and if it has end stops. I have two different types of clones and both types have pots that rotate a full 360. As you turn them up and down they change value until you reach this magical spot where the resistaby cdru - Stepper Motors, Servo Motors, DC Motors
QuoteEvil Monkey Just out of curiosity, what is your Masters Degree in?Management it looks.by cdru - General
If you look at the profile it isn't condusive for gripping the filament with the rounded peaks of the pully.by cdru - General
Quoteblacklineand yes there are issues with wood, but not with this wood, i don't now how about your info, but PEEK have a cont. bout 220° and a peak of 330° Here: Section 5: Autoignition Temperature: 1103 F./ 595 C It will have turned into a puddle of goo by the time it reaches that temperature, but it will not have burned. QuoteIt is naturally fire resistant and has been awarded an 'A1' ratinby cdru - General
QuoteOhmarinus The reason why I want a few is because I notice they have a much better airflow than conventional fans. I have one but it's too big sadly.It all depends on the specs of the fan. High CFM (amount of air) may be useless if the static pressure is very low and the air can't move around an obstruction (e.g. a tight heat sink). Or high static pressure useless if you're just blowing on thby cdru - Controllers
All stepper motors have continuous rotation, meaning they can freely spin 360 degrees and is positionable in any fraction up to the resolution of the step (e.g. .9 [400 steps/rev], 1.8 degrees [200 steps/rev). Stepper motors themselves don't have the capability to position linear. You'd have to have some sort of mechanism for translating the rotational movement into a linear one. This typicallyby cdru - Stepper Motors, Servo Motors, DC Motors
There are various issues with using wood. Each species of wood will have it's own dimensional instabilities based on temperature, moisture content, and grain structure. Charring and possibly combustion is also a risk with wood. Some woods will start to char as low as 120°C and the autoignition temperature for most woods is in the 190°-260°C range. Compare that to PEEK which is 595°C.by cdru - General
Quoteunicoder I think I just found another good alternative. I took a look at the bottom of a large tub of Smart Balance (margarine) and next to the recycle symbol it has a PP. I assume that stands for polypropylene? I cut it apart and found that I could get strips up to around 420 mm around the circumference. It's quite flexible and the thickness is around 0.54 mm. Too bad it's still not long enby cdru - Mendel90
Digikey has them listed as a "blower" as compared to a tubeaxial for a more traditional CPU-style fan. Searching ebay for "12v blower" returns results like you're looking for. Another name is centrifugal fan but I think that's usually for the larger versions, not the size you're looking for. The weird pricing you're seeing I beleive is sellers effectively "delisting" their item while still haviby cdru - Controllers
When I was looking for something suitable, I found the thin sheets used as cutting mats perfect, they bend pretty easily but keep a decent radius while also supporting the ribbon. Should be able to find one pretty cheap at most stores that sell housewares.by cdru - Mendel90
Ah. Then the dwell would work as long as it was executed prior to warming up the extruder or bed.by cdru - General
Quotestonedcoldskier I ordered from Robotdigg back in August, and the shipping was only $30 for a larger order - 8 Steppers, 2 with 450mm shafts, 20 LM-10 bearings, Belts, Pulleys, and probably a few more things that I'm forgetting. Perhaps I got a bit of a break for the size of the order, or maybe the shipping rates have changed. So long as the electronics work, I still think that their prices fby cdru - General
Quotelazzymonk Silly me. Should not reply to forum posts while half asleep. I re read and realised what your trying to do. You want G4 Dwell.That may be good if you need a short period for something. But having the extruder stay fully heated for an hour and a half may results in oozing, or if nothing else, cooking the filament. Plus, what was the original purpose of needing the pause? If it'sby cdru - General
I looked at RobotDigg when I was sourcing my parts for my Mendel90. Their item price is very attractive, but the shipping killed it for me. In my case, for 5 steppers, a length of 6mm belt and two tiny gears shipping was $35 IIRC. Add to that their lead times before they shipped were 5 days after they received their money. You also have 5-6 days for FedEx Int'l Economy, or 10-21 days for air mby cdru - General
Quotemyrddinstarhawk be able to select points in the Gcode and preposition them. be able to tweak the paths to allow for certain openings that i can use for making paths for multi material prints and sharpening edges of shapes like artwork lettering and complex geometries. be able to cut and past pages so i can duplicate identical layers for extending prints. be able to edit and add supports so pby cdru - General
QuoteFri I would like to use the fan that cools the hotend, to cool the abs/pla when needed.What happens when your extruder needs to be cooled but you don't need/want to cool the print? Or you need to cool the print but not the hot end? With a combined system (either multiple fans with a common power source or one larger fan cooling both) you lose control over when the fan blows and how much. Juby cdru - General
Standard polypropolyene has similar thermal conductivity ranges as ABS and PLA, all between .1 and .25 W/m.K. They all suck as a heat exchanger material as they don't conduct heat well at all, but I understand why you're looking to use them. If you make the walls thin enough to maximize the heat exchange, I'd worry about how water tight the wall would be over time with thermal expansion and conby cdru - General
QuoteShadowRam So no wonder PLA (that expands like a mo-fo) jams in these Hot-Ends. The stainless barrels aren't expanding enough to allow the 'warm' PLA to travel through.As a non-engineer, it would seem to me that stainless barrel would be the more ideal solution then the worse one. If the tollerance of the inner diameter of the barrel is more consistant, then its easier to design around. Ifby cdru - General