That machine is coming together beautifully. What firmware are you going to use?by Evil Monkey - Polar Machines, SCARA, Robot Arms
Have you tried pushing the little reset button on the side?by Evil Monkey - Reprappers
How many volts did you run into it?by Evil Monkey - Reprappers
When I designed my SCARA printer, portability was at the top of the list of features. There is a thread in the Polar bots forum with lots of pictures. I'm in the process of designing and building another that is smaller and lighter.by Evil Monkey - Reprappers
Yes, The RAMPS is a shield for the 2560.by Evil Monkey - General
Have you done any printing yet?by Evil Monkey - Reprappers
Besides the little bug at startup that causes the arm to swing over, ttsalo's firmware works just fine.by Evil Monkey - Polar Machines, SCARA, Robot Arms
The only thing I can tell for certain is that it is the G92 command that is causing all the problems with the x arm swinging over at start up.by Evil Monkey - Polar Machines, SCARA, Robot Arms
I think it has something to do with the G92 command.by Evil Monkey - Firmware - experimental, borrowed, and future
Do you mean Marlin_main.cpp? I've been digging around in there but can't seem to find what is causing this.by Evil Monkey - Firmware - experimental, borrowed, and future
Something else is going on because x and y home, then the x arm swings over, the z axis then drops 5 mm, this code has the hot end heating portion deleted but normal it would wait until the hot end heated up, then the z axis raises to 0.3 mm spacing from the hot end and the x arm swings the hot end to the center of the bed. Something else must be going on, some programed routine is causing this.by Evil Monkey - Firmware - experimental, borrowed, and future
I am trying to modify ttsalo's fork of Marlin that is used for SCARA printers. The program begins by homing each axis like this: G21 ; set units to millimeters M107 G28 G92 X0 Y0 Z0 G1 Z5 F5000 G90 ; use absolute coordinates G92 E0 M82 ; use absolute distances for extrusion G1 F1800.000 E-1.00000 G92 E0 G1 Z0.300 F1800.000 G1 X79.507 Y77.641 F1800.000 G1 E1.00000 F1800.000 However once the hoby Evil Monkey - Firmware - experimental, borrowed, and future
For what its worth, I've built hot ends where the filament came in perpendicular to the nozzle, so the print head could be less than 1 inch longby Evil Monkey - Polar Machines, SCARA, Robot Arms
One suggestion, you may want to add a way to very finely adjust the home position, possible adding a screw with a locknut that the end stop impacts. The start position needs to be as exact as possible or else the print or cut will be distorted and you may have problems adjusting those end stop clamps by hand.by Evil Monkey - Polar Machines, SCARA, Robot Arms
Hard to say, it crossed my mind that I could use this on my SCARA printer and be able to print ABS without a heated bed, but it is only 9 inches square. The aluminum for that would only cost around $20. A brake bleeder hand pump could be used to pull a vacuum.by Evil Monkey - Polar Machines, SCARA, Robot Arms
That is a beautiful design! If I can figure out how to get rid of that startup bug in the firmware that causes the arm to swing over, I will let you know.by Evil Monkey - Polar Machines, SCARA, Robot Arms
Something like this. Just tape over the holes not needed to maintain the vacuum. View from below Pull a vacuum from the hole in the bottom plate.by Evil Monkey - Polar Machines, SCARA, Robot Arms
That could work if you didn't mind drilling little holes in your print, but what about a vacuum table similar in concept to what machinists use, there couldn't be lots of grooves for obvious reasons, but a number of small holes pulling a vacuum could work.by Evil Monkey - Polar Machines, SCARA, Robot Arms
It's definitely an interesting idea. Do you have a target dimension? If so you could get a rough idea of the mass of the object being printed, then do some experiments to find out if the build plate adhesion will be strong enough to hold it and go from there.by Evil Monkey - Polar Machines, SCARA, Robot Arms
That machine is great! I would love to see the firmwareby Evil Monkey - Polar Machines, SCARA, Robot Arms
Hi Nathan, I've settled on the Armstrong type arms. One of the main goals I had when building that machine was compactness and portability. The Armstrong arms stow in a much neater fashion. If you modify Ttsalo's firmware in the manner I described above it will work fine, endstops and all. The only issue is at startup the one arm swings over as can be seen in some of the videos linked above. Ifby Evil Monkey - Polar Machines, SCARA, Robot Arms
I'm toying with the idea of making a small, and thus more light weight SCARA printer. This one would use NEMA 11 stepper motors instead of NEMA 17's. A rendering next to the arms of the other machine. This one would have a stationary platform and the arms would move up and down on some Makerslide.by Evil Monkey - Polar Machines, SCARA, Robot Arms
Any more progress on this machine?by Evil Monkey - Reprappers
Any pictures or renderings of your progress?by Evil Monkey - Polar Machines, SCARA, Robot Arms
Thanks, I'm curious, are you going to machine the pulleys as well?by Evil Monkey - Reprappers
That will look awesome when it's done! Have you checked out the polar bots sub forums? Also, in the firmware sub forum, there is an effort being made to add Morgan firmware to Teacup as an FYI.by Evil Monkey - Reprappers
There is a free downloadable version called netfabb basic.by Evil Monkey - Reprappers
New, permanent bed leveling mechanism.by Evil Monkey - Polar Machines, SCARA, Robot Arms
Resin printers don't necessarily work like that. It says it uses UV LEDs to harden the resin, so most likely the only moving part is the Z axis.by Evil Monkey - General