Ben, found ur blog about the HSG motor. I just got my gocart going pretty well. Latest vid is at about 70-80% good and Roger just helped me get to about 90-95% good. So far I have pulled 19.7hp out of the motor. Loved all the info u had about the HSG and pulley design. I plan to put cogged belts on my real build. The current gocart is just a test bed.
Very cool! Really neat to see you independently come to a lot of the same conclusions that John and Ray at Decent did. What kinds of max flow rates are you seeing? That's been a sticking point in the comparison with traditional machines/levers.
This is coming along very nicely! Are you just watching the pump to get flow rates or do you have a flow meter installed? I built a distillation setup and had a hard time finding something relatively inexpensive that could move a measured amount of water through the reflux condenser.
No flow meter, just modeling the pump displacement and leak-vs-pressure, calibrated against a scale. It actually works really well, the final shot weight usually comes out within a gram.
Python, using pyqtgraph to plot. The main trick to getting the plotting to be fast is downsampling so that there's a maximum of 500 points per trace being plotted. Still kind of disappointing plotting performance though - it's over 30 fps on my laptop, but I only get 5 or 6 fps on the raspberry pi 4 I'd like to eventually run the machine from.
@@BenKatz I have found a potential one. First, turn off autoscaling on x axis then set a value for xrange e.x. 10 seconds. Now start the update loop and in that loop check if your data is in the range or not. If not then set xrange to more than it was e.x. 20 seconds. What this function will do is to stop redraw your plot repetitively. This approach should give massive results.
Now we just need to get some sensors that can record data on the extractions, and I can plug it all into some kind of machine learning models and code up even more custom shit
