| ??? 05/23/08 18:41 Read: times |
#155070 - Split ground plane question |
I am currently working on a project that involves moving of a plate accurately. The plate is moved around using a DC motor, and a potentiometer is used for feedback. My system has a few high noise causing devices including solenoids, and other high torque DC motors.
My question is more theoretical since I am really confused as to the proper design of the PCB. The current design relies heavily on filtering. Filtering I still believe is inadequate. We do not have split ground planes for the A/D, Motor/Solenoids, or Digital components. They are simply connected to the common ground wherever it is easy to do so. When the solenoids or motors turn on I see spikes on my VCC line and these spikes are causing me headaches while I am trying to move my plate. In the range of 5-7 bits of error. Is this the type of situation where we should be using split ground planes? 1 for the Motor/Solenoids, 1 for the Analog,1 for the digital? |
| Topic | Author | Date |
| Split ground plane question | 01/01/70 00:00 | |
| te first I would do | 01/01/70 00:00 | |
| And | 01/01/70 00:00 | |
| My suggestions | 01/01/70 00:00 | |
| this sounds like a great idea | 01/01/70 00:00 | |
| Show us your schematic and layout | 01/01/70 00:00 | |
| Electronic Rotary encoder | 01/01/70 00:00 | |
| PS Requires a magnet on the moving part/ | 01/01/70 00:00 | |
Consider This One | 01/01/70 00:00 | |
| Cost | 01/01/70 00:00 | |
| possibly no gain | 01/01/70 00:00 | |
| Worse | 01/01/70 00:00 | |
| I know of nopotentiomater that is not noisy ... | 01/01/70 00:00 |