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« on: February 24, 2022, 05:48:54 PM »
Hi Craig,
You are right, i know that its not just the g, one side pushing of a gantry heavier than lets say 250kg will likely create more wobble on thinner ballscrews since the x axis is the longest (ballscrew length is 2000mm) i got 40mm because of that, just to make sure. So its not just to create higher torque, wobble in the ballscrew will kill the c3 precision according to the manufacturer TBI, they advised it for the length of the axis and weight of the gantry. U can drive an axis which weighs 2 ton with that ;-)
They are good at what they are doing for example i thought to use the ballscrew on the zth axis one end open, thats the way some bigger manufacturers like makino use ballscrews on zth axis just to keep it short but engineers in TBI said u should never use a ballscrew like that because it will shorten its life. And if u want precision they said always fix the opposite end with c3 bearings. so i dont know how the manufacturers use it like that and keep up with the precision.
U auto tuned the delta servos with their pc software right? Is it easy to tune them? is it full automatic or u had to tune them manually?
Also, do u think an oscilloscope will be helpful for manually tuning the servos? i still wanna use 11nm 130mm flange servo, its worst performance is still better than open loop stepper i guess. Can i tune it by seeing the signals on oscilloscope? i never used an oscilloscope before but is it useful for this purpose?
Hakan