Power Supply Fun – Ensure Your Machine Has Adequate Amperage

Hello Maker friends,
This week, Louis and I encountered a few problems with our machine tripping, or requesting E-Stops, during complex build and print cycles. After conducting a good bit of analysis, analyzing the circuitry of the system, and confirming that we had solid ground connections, the problem was traced back to a rather simple cause – insufficient amperage generated from our 48v power supply.

Considering what we have learned through this experience, we thought it would be beneficial to post out a fix to our problem. If you are building a large machine that includes more than three stepper motors, we recommend purchasing a non-switching power supply that supplies adequate amperage during cycles where all of your axis’s are moving. Without adequate amperage being supplied to each of the stepper motors, your machine will likely begin to trip or request E-stops because the motors simply will not have adequate power flowing from the power supply to feed the requested movement of all the axis.

In addition, our setup using a Gecko G540 which has a (50v limit) however the amperage required for our moderate sized 380 oz/in stepper motors is much higher than the approximate 7A provided by most typical 48v DIY CNC power supplies. If you encounter this issue when building your machine, we recommend purchasing the 48v, 12.5A power supply from CNCRouterParts.com

Hope this helps and thanks for reading.
Aaron & Louis

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