Show all posts by user
p.s. RepRap.org isn't responsible for scams and bad deals.
Re: Scale up help needed - 10 years ago
You're getting paid for this? How cool. Have a look at how 3DP do it. That arrangement may work out better for you. It is the right sort of scale for what you have in mind. Openbuilds have just launched a new range called C Beam. That and their v slot extrusion would make for a nice sturdy assembly of that scale. Keep us posted. Sounds like a great project. Aby alan richard - General
Re: SD card problems, Marlin+ramps1.4+reprapdiscount smartcontroller. - 10 years ago
Hi I was about to reopen this old thread too. I tried an old, old 16MB SD (SDC-16M) card It didn't work. Even setting SDSLOW in configuration.h I've just bought a SDHC card which (now) works. Problem is - Its an 8GB card - I had to partition it down to 2GB and format it as FAT. (FAT16) It works but I'm a bit galled at throwing away 6GB*. The cardreader wouldn't recognize it as FAT32. I couldby alan richard - Firmware - mainstream and related support
Re: OK print but the dimensions are a bit out - 10 years ago
I'll try that. Bit of a work around. But if it works it works Thanksby alan richard - Printing
Re: DRV8825 Can't set 1/16 stepping - 10 years ago
Yes Andrew.1/16 works but I miss the nice quietness of 1/32. I don't miss its freakish behaviour though. Yes Wurstnase. Easy when you remember. Can be very confusing when you forget. "Hier Bohren für neuen Monitor" Haha I'll go and get my drill. Does it arrive by post or something? I'll let you know when it arrives. Thanks aby alan richard - RAMPS Electronics
Re: Aluminium Heat Bed - 10 years ago
The proportional control of pid is just a matter off switching on/off/on/off quickly as the target temperature approaches to avoid overshoot. As it gets very close the off portion becomes longer to maintain temperature but not overshoot. These times and values are as defined Kp Ki Kd The hotend uses pid control, anyway, hence why the flashing indicator light (On my RAMPS board) flashes at differby alan richard - Reprappers
Re: Scale up help needed - 10 years ago
I'm with Andrew and Zavashier on this one - It should be made a sticky; "For anyone contemplating an extra large Reprap build..." I don't want to knock anyone down for having dreams or ambitions but What you would gain in knowledge from assembling and using a regular kit printer (i3 etc), I believe it would easy pay for itself against the cost of constructing anything non standard or large. Theby alan richard - General
Re: OK print but the dimensions are a bit out - 10 years ago
Hi. I imported the acad .stl into solidworks and the dimensions are correct. I note that by default the AutoCad cylinder is more 'polygonny' than one produced by solidworks, I believe that is adjustable in settings. The increased number of vertices produces a smoother cylinder as you'd expect. It seemed slightly smaller though. I only printed 10mm long sections so it was hard to measure withouby alan richard - Printing
Re: OK print but the dimensions are a bit out - 10 years ago
That's Interesting ggherbaz. I do have a 'copy' of Solidworks. I'll give it a shot. ACad does export .stl files but can't import them to check them again. I don't think the software is really optimised for producing printed parts. Its more a 'jack of all trades - master of none' I've not been printing long. So for a first attempt I am quite happy with the overall tolerance - 0.06mm deviationby alan richard - Printing
Re: OK print but the dimensions are a bit out - 10 years ago
Thanks for the answer. I think steps/mm are fine as travel moves seem correct. Objects were drawn in AutoCAD so should be dimensionally correct. I understand the reasons why holes end up undersized but as I say the cylinder wall midpoint has ended up undersized too which would be a different issue. Is Simplify3D worth paying for would you say? -aby alan richard - Printing
Re: Building Core XY Printer: need help deciding on what built - 10 years ago
@Reprot - Thanks Bruce. Also I appreciate your assistance with a couple of issues I had. I have to say I drew inspiration from your 'everything inside the box' school of design. @dc42 & @Reprot - I'm quite happy to stand corrected on these things, especially if I turns out I did the right thing after all. I've not been printing long enough to start pushing the speed and acceleration envelopby alan richard - CoreXY Machines
OK print but the dimensions are a bit out - 10 years ago
Hello I printed an open cylinder sliced using Slic3r's Spiral vase tool. PLA 190° Bed 60° 0.1 layer height 0.4 nozzle It should have been 16mm OD with a 0.5MM wall It came out at 15.68 to 15.74 OD (avg 15.71) with a wall of 0.43 The mid point of the wall thickness should have been at 15.5MM dia but from measurement was average 15.27 Not much to see; I also printed a couple of 50mm cubes,by alan richard - Printing
Re: DRV8825 Can't set 1/16 stepping - 10 years ago
My edit button has gone! Donkey that I am, I changed the stepper jumpers and steps/min in Marlin but didn't update the eeprom with the new config settings. That just added to the confusion. aby alan richard - RAMPS Electronics
Re: Building Core XY Printer: need help deciding on what built - 10 years ago
Hi Andrew. You are quite right, its not optimal. It does print ok so far with PLA up to 80mm/s but something rougher like Timberfill wouldn't go up there. I expect the friction on the filament will vary depending where the print head is which may show itself on bigger prints. I don't usually do; 'form over function' but that was one case on this build to try and keep it all within the box. I'lby alan richard - CoreXY Machines
Re: CoreXY printer slowing down near 0 speed - 10 years ago
Hi. If it helps, I've had motion troubles with 1/32 stepping on Ramps/Marlin. 1/16 seems ok. It showed itself most when coming to the end of travel where it seemed one motor would stop before the other with a nasty clonk. It is tricky to diagnose travel problems with coreXY as both motors are usually moving and its impossible to isolate each drive to check for mechanical issues. Maybe try settby alan richard - CoreXY Machines
Re: Building Core XY Printer: need help deciding on what built - 10 years ago
Forget CoreXY go with cartesian, or maybe even something of the prusa style. I say this from the perspective of having successfully built a coreXY. I think I too was 'seduced' by the idea of having a high speed, low mass printhead churning out super fast prints. I don't think moving mass is the limit to speed; It is partly the ability to extrude plastic quick enough and mainly the desire by moby alan richard - CoreXY Machines
Re: Need some help with calibrating - 10 years ago
Mm - fans - the extruder fan is usually for all metal hotends to stop the heat travelling up to the cold end and melting the filament too far up - ie it becomes too floppy to push through. It would have less effect on the print quality than a work fan, though an extruder fan will waft the air around the part anyway. RE cooling ABS - I think its a balancing act between allowing the part to slowlyby alan richard - Printing
Re: Laser cutter without a laser - 10 years ago
Good theory. Why do you think tungsten carbide? I know it's quite tough but why not any other metal? Any thoughts on a heater? Induction perhaps? Could be controlled with standard reprap stuff with the right sort of thermocouple and amplifier. -aby alan richard - General
Re: Need some help with calibrating - 10 years ago
It's very melty. Try to print a proper cube for calibration. I had to Google 'companion cube' It's quite a fiddly shape where the nozzle has to dwell over it If it's small. How big is it? Was it printed square to an axis or at an angle? It looks like some layer shifting has occurred. Have you checked belts/ pulleys? Any nasty motor noises during print/ skipping steps? -aby alan richard - Printing
Songs of the stepper motors - 10 years ago
I was enjoying my last print - lots of chirpy tight curves with some chugging techno cubes. Am a bit sad now listening to a continuous spiral print - a really repetitive industrial tune, reminds me of a gloomy NineInchNails number. Not that I can think of any of their songs that wasn't gloomy. Has anyone got a cheerful sounding .stl I can print? -aby alan richard - Sandbox
Re: Deceleration problem, not acceleration CoreXY - 10 years ago
Thanks dc42. I did wonder if the wee Arduino may be struggling with the number crunching and quite agree about the print speed. Just checking for something I may have missed. Regards aby alan richard - General
Re: Deceleration problem, not acceleration CoreXY - 10 years ago
At 7500mm/m it is ok with Acels up to 3000 and Jerk up to 20 At 7501mm/m it gives the clonk even with Acel at 200 (wow, so slow) and Jerk at 1 Is there anything significant about 125mm/s 7500mm/m? I'm starting to wonder if its firmware which is latest Marlin of 2 days ago. Ta. -Aby alan richard - General
Re: Deceleration problem, not acceleration CoreXY - 10 years ago
Ahum! Scuse me. That should be mm/minute.by alan richard - General
Deceleration problem, not acceleration CoreXY - 10 years ago
Hello. I have an issue. I've tweaked and tweaked acceleration and jerk values and motor current again and again but not resolved it. If I issue a move to X or Y at more than 7500 mm/s It starts off ok, accelerates at any rate ok, but at the end of travel it 'clonks' and skips on another 2 or 3 mm This is on a CoreXY set up. If I configure it not as CoreXY - ie each motor moves my 'thing' diaby alan richard - General
Re: Help Configuring Marlin (Sorry to ask!) - 10 years ago
Hey, I can make myself look dumb, thanks. Think it was; 579 #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en) in configuration.h that I had to uncomment, is all. I had a sneaky feeling about that. It wan't in earlier configs. aby alan richard - Firmware - mainstream and related support
Help Configuring Marlin (Sorry to ask!) - 10 years ago
Hi. With earlier versions of Marlin I didn't have much problem setting it up for my machine. I have a standard list of config mods. (below) that I do and that would be all. (Copying config.h from one version to a later one doesn't compile lately) My last 3 attempts over the last 2 months just end up with a blank (but illuminated) LCD and no ability to talk to it via Pronterface. I keep thinkinby alan richard - Firmware - mainstream and related support
Re: Splitting a part ? - 10 years ago
Autodesks (free) Meshmixer is worth a look also. It takes a little bit of learning It can do that. -aby alan richard - Reprappers
Re: Extrusion problems - 10 years ago
Have you correctly fitted the nozzle with the heatbreak tube? The nozzle does not screw hard into the heater block itself, the end of it it should butt up against the heatbrake. Maybe the tube needs to screw further into the heater block and when the nozzle fits in it should project a little further out, not sit flush with the heater face. aby alan richard - Printing
Clunking steppers at end of move command DRV8825 - 10 years ago
Hello. I have an issue with X & Y movement on a coreXY machine. I'd previously had no problem with A4988 drivers at the same speed. I (embarrased) fried my RAMPS board and steppers and replaced them with DRV8825 steppers, set at 1/32 step If I issue a pronterface 100mm move command, Feedrate at anything over 7500mm/m -it travels fine, but at the end of its travel it makes a nasty kind of 'cby alan richard - Stepper Motors, Servo Motors, DC Motors
Re: Miniature Couplings with variable diameters - 10 years ago
Hi Dan. Clamp couplings are either a fixed size bore with a split to clamp onto a shaft or slightly oversized bore with screws to clamp a shaft. I've not come across any that would adjust as you suggest. Why do you need that range of sizes? You want to be searching for flexible couplings really. 5mm at the stepper end are plentiful and cheap from the 3D printer suppliers, Ooznest etc. 4mm is nby alan richard - Stepper Motors, Servo Motors, DC Motors
Re: DRV8825 Can't set 1/16 stepping - 10 years ago
Nope. Funny enough its still not having it - having removed ms1 and 2, Left 3 in, still gives me what seems to be 1/8 step. I wonder about the driver having 3 jumper settings for 1/32. Maybe I'll experiment with other jumper settings but I just can't seem to tune these to run the motors smoothly without skipping if I drive them from pronterface even 1/8 step. My previous A49988 were fine. I'm teby alan richard - RAMPS Electronics