Show all posts by user
People building or using RepRaps.
SENSORLESS_HOMING for Syringe type extruders - 6 years ago
Hi everyone: I'm trying how to do a sensorless_homing at E/min or E/max for a Syringe extruder. Actually it's implemented just for XY and Z axes. It's complex to make it work with the extruder as well? Do you think it could be possible? Having that, I can home the syringe at full position when inserting it, and stop when it get empty without cabling or external addons. Marlin 2.0 bugfix and SKby marcossf - Firmware - Marlin
Re: Megatronics v3 (DRV8825) stepper won't move anymore - 10 years ago
I put this diode and its hot enough already (102ºC at full load printing)by marcossf - Controllers
Re: Megatronics v3 (DRV8825) stepper won't move anymore - 10 years ago
Just having this D3 diode failure on my Megatronics v3. Its a poor design i think. My motors are 2.8A nema17 and DRV8825 drivers, configured at 1.10v each). Its two times so far that this diode was burned out. I'm seeking for a diode that support the current and heat the motors and drivers are eating. My selfmade coreXY 3d printer consume arround 5.5Amp I've routed the solder pins to the exteby marcossf - Controllers
Re: SD not working with Megatronics V2.0 with SainSmart LCD - 11 years ago
Solved! The pins, the cable I made, and the SD reader was ok. The problem was the SD card. I'm trying with some 1 and 4Gb old SD cards that I have at home. Bart form RRW told me that if could try with another SD because some are problematic with SPI. I put a 8Gb Samsung microSD on an adapter and inserted in the SD reader and it works as expected. No firmware or wiring was changed, just the miby marcossf - Reprappers
Re: SD not working with Megatronics V2.0 with SainSmart LCD - 11 years ago
Phisically yes, but I din't made any modifications on pins.h, just connect pin-to-pin as RRW say on their SD manual. Only these lines are for the SD card on pins.h #define SDPOWER -1 #define SDSS 53 #define LED_PIN 13by marcossf - Reprappers
Re: SD not working with Megatronics V2.0 with SainSmart LCD - 11 years ago
Given up from the LCD SD card reader because I don't want to jumper or solder my board, I brougth a external SD reader from ReprapWorld, made a cable to attach it pin-to-pin to the Megatronics external SD connector but also doesn't work. I asked to RRW support but they don't answer to my mail. It receives power on pin 1 and gnd on 7 but not SD Card is detected when inserted. The inboard micro-Sby marcossf - Reprappers
Re: Ordering a silicone rubber heater from a chinese company - any suggestions? share your experiences with chinese shops on Alibaba please! - 11 years ago
A few days ago I ordered two silicone heated bed custom made to my printers from a chinesse company called Keenovo. They had shipped today and it will be 15 days to arrive to Spain. It cost 102.50$ each, but are 415 x 260 mm, 5mm thick silicone rubber insulation, 220v AC- 600W, and custom holes to attach fixations and thermistor. They sent me a photo of the finished product before it been shippby marcossf - Developers
Re: SD not working with Megatronics V2.0 with SainSmart LCD - 11 years ago
I got the same problem with my Megatronics 3.0 and the Sainsmart Full Graphics LCD. All work ok, but SD card (on LCD panel) it doesn´t. But reading all this post threads it looks like there isn't solution to this problem. Where's the problem? On the LCD SD reader? On the Megatronics board? Marlin software? I'm think its better go for an external SD reader, and do not waste more time. Is thereby marcossf - Reprappers
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Did you enabled corexy un Marlin? I had to invert the position the M2 motor conector on my Megatronics to get it work.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Ah! Ok. My mistake, sorry Spanish: Misan, no cogí lo que querías decirme. La "resolución" de 6400 pasos por vuelta con 1/32 es correcto.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Quotemisan @marcossf: then I guess it is 200x32=6400 steps/rev Nope, you're wrong. Steps_per_mm = (motor steps * motor microsteps) / lead screw pitch 3200 = (200*32)/2 With 1/32 microsteping 1600 = (200*16)/2 With 1/16 microsteping 1.8º motor steps/rev = 360º/1.8º = 200 steps/rev. Trapezoidal lead screw 10mm diameter, 2 mm pitch/rev.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Quoteakhlut @marcossf what is the lead of those screws, and what is the resolution of you steppers? Hi akhlut The lead screws are 10x2, the steppers are DRV8825 configured to work at 1/32 microstepping (3200 steps/rev). Motors are 1.8º step angle.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Quotemisan @marcossf your z-axis rods should be aligned with bearing axis for best performance. It's modified again, but Z axis doesn't need such high performance. It have 2 linear rails from Igus, two drylin 40mm sliders on each guide. There isn't sag on it, and goes up/down nicely. I'm going to change the Z stteper to 1/16 (now 1/32 seem to much resolution for Z axys) and gain a little speed wby marcossf - CoreXY Machines
Re: Using Frame for Linear Motion? - 11 years ago
My CoreXY that i'm bulding have 30x30 alu profile and square blocks. It doesn´t flex at all, and its 560 wide x 470 deep x580 tall (in mm) Also use some IGUS linear motion parts. Some photos on the post: Hereby marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Quotezelogik@marcossf: Nice open case. At first I wanted exactly the same thing, but the corner/profile price increase the cost to much for me... And I have some doubt on the deflection of the frame with fast mouvement. The case will be totally closed, one interior enclosure to mantain temperature and one external skin to get some aesthetic. What doubt? I'm open to any ideas to improve it. I siby marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Some photos to update my machine: Things to do: - Bowden motor supports - Finish autolevel retractable probe - Hotbed base plate - 220v Silicone heat pad and solid state relay - Cable chains - Fans, blowers, connectors, etc. - Exterior plastic enclosure Finally the printable size is x:440mm y:280mm z:350mm. The movement on all axis is smooth and fast.by marcossf - CoreXY Machines
Re: How to invert the XY Axis for CoreXY system - 11 years ago
I just found this post. I having the same problem with my CoreXY printer. Confirmed, turn 180º the motor conector on one motor, i was able to achieve my printer work as expected. Thank you all Marcosby marcossf - Reprappers
Re: Corexy - How to invert only the X axis direction - 11 years ago
#1 - Power the servo from the power supply (or other external) instead from the board. And some cheap servos have some jitter also, look for high quality one. #2 - I had same problem and tried to invert the motor cables without success. I need X axis to be Y axis in my CoreXY. Still trying to find how to do it. #3 - Try the #1 clue, servos are some power noise problematics. #4 - Firmware sure,by marcossf - Reprappers
Re: Atfer Hbot, go to CoreXY. - 11 years ago
akhlut: Misumi europe only sell to bussines not individuals and their UPS charge its mindblowing. Mcmaster its at USA, and here in Spain it will be charged for importing fee (so much!). ybm: The french page doesn't have on 4 and 5mm shoulder diameter. The lesser its 6 mm. I'll keep going searching. Thank you two.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
One question to all of you Where to buy shoulder screws (4mm and 5mm shoulder diameter and 25 mm shoulder long)?? I was unable to find everywhere and also its hard to find on internet.by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
Quotenhathaitrieu6 Hi zelogik and jand, is there any reason why the motor mount cannot be direct? What I mean is, remove the 2 idler pulleys in the motor block, and the 90degree bend from motor block to XY block. I have attached a picture to make it clearer. It is that way because it need to have a tensioner idler on each belt (must to be the same tension on each one).by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
QuoteDejay Hey Marcossf, that frame looks pretty cool. How is that drylin Q carriage working out? It's pretty expensive on motedis.com, is there cheaper sources for something like that? I'm been thinking about making a modified version of Johann's linear motion carriage with recirculating delrin / acetal spheres, so that it encapsulates a standard extrusion. The spheres would cost about 3$ for 10by marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
QuoteReinholdYES Marcos please do ...if you have enough material open a new thread ... and let us know where we find it. My design are on early stage, I just begin to build the chasis. Next will be the Igus linear motion rails for Y and Z that I'm waiting for. And it's so much to do then (probably redesign/adapt the parts accuratelly to movements and gaps). Here are some photos: Sorry Jby marcossf - CoreXY Machines
Re: Atfer Hbot, go to CoreXY. - 11 years ago
I have a Prusa i3 and I also had put some PFTE oil on X carriage Igus RJMP-08 and it slide much better than oil-less. You're right about its too tight. I'm designing a CoreXY motion 3DPrinter, learning from all of your post reading (so much info!). I will put Igus miniature linear motion slides on X and Y axis. This week i'll begin with the extrusion aluminium chassis. I will upload some photosby marcossf - CoreXY Machines