Machines like this needs Bowden cable filament feeds. Bowdens have matured a lot in the last couple of years, and has been running reliably on my machines.by qharley - Polar Machines, SCARA, Robot Arms
The main reason why I stick to 200x200 (I live in metric world...) is that the printer can fit comfortably on a desk, hotbeds are readily available, and "only" consumes 100 to 120W. Larger printers will not be a problem if you resort to printing PLA only on an Acrylic bed, Mega Simpson... That thing would need a blast alarm to go off at least 10 seconds before printing starts! and it would nby qharley - Polar Machines, SCARA, Robot Arms
The legs are not straight to stabilize the platform. The legs are two sets of triangles (triangles are stable) and they are placed in such a way as to want to twist the platform away from the center, each to its own side. This creates stress in the PVC pipe, which in turn takes the flex out of the frame. Morgan had straight legs initially, and it was swaying like a tree in the wind...by qharley - Polar Machines, SCARA, Robot Arms
My main concern with normal threaded rod is that the way it is made makes it unsuitable for high quality movement. I could see a marked quality difference when i switched my machines to the experimental drill bit z drive. It also sped up the drive, removing quite a bit of waiting, given Morgan's 200+ build hight, and max homing.by qharley - Mechanics
I like it, and I almost used something similar if only i could get it in a smaller size than 12 mmby qharley - Mechanics
Hi Woo, Yes. The comcept I have been playing with will be all of that. It already has Some trimmed down parts - more work here though Line drive arms with a much higher ratio The beginnings of a dual extruder toolhead A new arm arrangement concept is brewing, that will allow the machine to appear cleaner without sacrificingby qharley - Polar Machines, SCARA, Robot Arms
So that's it? Some crazy ideas coming through on the Morgan forums as well. Most want more extruders, quite a couple wants to get rid of the copper pipes. Enclosures... No belts / pulleys... Worm gear drives?by qharley - Polar Machines, SCARA, Robot Arms
TH Morgan is now out and working. What to do… Thomas needs a wife… Lilian Vaughan Morgan was the real life spouse of TH Morgan, and as it turns out, was a geneticist in her own right. What would you like in Lilian? I have my own ideas… like to hear yours! Lilian needs to be an ever cleaner, simpler version of Morgan – with more than one print head. Real life Lilian was a geneticist as well asby qharley - Polar Machines, SCARA, Robot Arms
Hi, Quentin Harley here... If you have any questions, I will answer them for you. I will take a closer look at some of the post above and post some feedback later tonight. Cheers, Quentinby qharley - Polar Machines, SCARA, Robot Arms
Robots work, but to make it work you need to find a way to keep weight away from the arm... Momentum is a real problem, and unless you have insane amounts of torque on tap, and cast metal arms, it will influence quality to a large degree. Look at bots like Simpson and Morgan for inspiration. And again, good luck!by qharley - Polar Machines, SCARA, Robot Arms
same here... All the applicants will have to share the prize to pay for medical expenses...by qharley - Kartik M. Gada Humanitarian Innovation Prize
Any news?by qharley - Kartik M. Gada Humanitarian Innovation Prize
Very exiting indeed! Congrats on getting it going. Such a magical moment when you see your creation actually starting to do what it was made to do, and it actually works! Cheers, Quentinby qharley - Delta Machines
So Jealous, When I started out nobody I asked even heard of 3D printing, let alone supplied me with electronics or anything else for that matter... I well, at least Morgan is 100% self built and self funded... I hope this puts Simpson on the fast track! Cheers, Quentinby qharley - Delta Machines
Morgan is now released and in the wildby qharley - Polar Machines, SCARA, Robot Arms
My bowden is currently about 60cm, thats 24inch. I could probably make it a bit shorter, but it works for me.by qharley - Delta Machines
I am not giving up on Bowden just yet. The latest version of Slic3r has quite a couple of quality enhancing features built in, and the prints I am doing today are not displaying the endless oozing and stringing and blobbing of my first attempts in February. Remember that Kossel is a seriously beefed up Rostock, and the move may not agree with your vitamin hunt.by qharley - Delta Machines
As Nicholas just stated, accuracy is not important any more. That is the beauty of electronic adjustment. It frankly does not matter where the switch is, as long as the repeatability is good. Then you just tell the electronics where there is... It will be different for each one you build, but the calibration routine can be included to calibrate the positions. In Morgan I have to calibrate twoby qharley - Delta Machines
Interesting! For Homing on Morgan I use a small magnet inserted into a hole in the disk, with a digital hall effect sensor as limit switch. Because the magnet moves sideways, the switching range of the polarity dependent switch is very small, making it quite accurate. I am allergic to anything optical. Real job is medical imaging systems, and opto sensors on moving parts are prone to dust, diby qharley - Delta Machines
Vitamins are vital, but too much vitamins are normally the orange stuff you see in the boal after the morning tea has worked itself though your system. I believe it should be the same for Reprap machines. I tried my best to get to some kind of arrangement that would solve the need for linear rails in Morgan, but just could not get something stable enough to serve the purpose. The least amountby qharley - Developers
What a journey! It is almost like sending your kid to school for the first time... For those of you in South-Africa, We'll be at house for hack in Centurion Cheers, Quentinby qharley - General
Hi there! My drive wheels are at the bottom of the machine for two reasons: They would intrude into the build area if directly below If above the arms, the weight of the machine would be very high, and then you also have to devise some system to suspend and hold the motors, without interfering with the bowden cable... The drive wheels are very large in order to make the resolution as high as pby qharley - Polar Machines, SCARA, Robot Arms