![]() Since the Marlin controller doesn’t support closed loop, I would just abandon that idea and use open loop motors. It would be good if the other motor knew where it’s zero position was, but if you get that wrong, squares will still be square, they will just not be upright on the table. The trick is that you have to know at least the angle where the arm is straight. The steppers count very accurately and there isn’t much use for actually knowing the position. I don’t think closed loop will help you at all. If it’s off by 3x, or 9x, it will be pretty obvious. This is easy to verify by setting the steps/unit to 26.67 and then commanding a distance like 180degrees. (200Stepps*16Microstep) * 3Umdrehunhen am Motor / (2GR2Riemen * 40GrossesZahnrad-Kleinen Zahnrad)Ģ00 steps/rotation * 16microsteps/step * 60T/20T * 1rotation/360degrees = 26.67steps/degree. But you will set it for steps/deg to match the output from the python script. ![]() For example, Marlin uses steps/mm to determine how much to rotate each arm. I think it’s very possible for you to not need to write or edit any software, but you may need to try to understand what it is doing, and tune some of the settings for your build. That isn’t a complete work, but it is close, and I suspect and and myself would be happy to help with any questions you have. I wrote a python script that can be ran in the browser to convert sandify thr files into the Marlin x, y command you would need to run a scara table in Marlin. So when a line goes from quadrant 4 to 1, the angle is greater than 2pi. 2) I am keeping track of movements around the circle, and I am outputting the angle in a continuous angle. 1) I use a ton of vertices to create lines, so you won’t have to. Just because it has a lot of the same challenges and I’ve solved them in sandfy. This is just too interesting.įirst, I am going to again push for using the theta rho output. "Sandtrails" - a polar sand table Your Builds ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |