Originally Posted by frog I have a question does anyone have experience with 16f84a as a stepper controller I have built my own design and when I up the voltage to 40 volts with 4.1 volt 1.1amp steppers my micros scramble and I have to reprogram them I have diodes out the gazu to stop this I have been working on this night and day for 1 month built the whole thing from scratch it works ok at 5 volts but looses sync on y axis it has to be something simple any help would be appreciated do I need to couple the power pins on the micro with pico caps help me sombeody loosing my hair. are these motors big enough for an 18'' x 18" mill when they are working you cant stop them then they start to stutter then I have to reprogram the chip.I am using a hex buffer in from of tip 122 unipolar motors. |
Switching 40V@1.1A will cause a lot of electrical noise. Apart from bypass caps on the PIC supply (about 100nF), you may need a larger filtering capacitor on your power supply. Also the PCB layout is also crucial. Wire the supply in star configuration.
Maybe start a new thread to avoid hijacking the original thread on PICStep
