One of my concerns on 600V design is how to make ADC readings in the 600V area. I need 3 x Current sensors, 1 x DC Voltage Sensor and 1(2) x Temperature sensors in addition to support for up to 3 resolver sensors as well as an external motor temperature sensor. That sums up to…
Most of you have already seen my main PLC Core board with 3 x CAN ports and 10 x Extension ports. What I plan for the MC is to extend this to 4 ports wide, keep one CAN port and add a 24V power port, replace the MCU with a smaller Rx (64 pin) version,…
I have done a few smaller motor controllers in the past, but as I currently work a bit with PLC’s and use larger 400V motors I must admit I am considering making my own PLC/Motor controller. I use the terminology PLC for my own embedded, modular system and having a motor controller that fit into…
This is a very powerfully PWM Output Module with Encoder input. It is capable of 4 independant Half H-Bride, 2 x DC Motors or a full Stepper at 10A/24V. At least the electronics will manage a lot, but supply limitations and pin limitations means it will be a bit more limited, but yet. The primary…
Looking at my CCU board I have 4 components that are of concern related to vibrations! Top-Left I have a USB connector, but this is for development only so it will not be mounted in production. Top-Right I have DC/DC and connectors that might need support. And in the midle I have done a mistake…
In my last entry I wrote about challenges with sizes on opto-couplers. I have since discovered isolated digital IO modules with twice the density compared to opto couplers. They also offer 100Mbps speed and bi-directional solutions. I recently used a version of this motor/gear with a Nema17 tor run the wheel on my mobile CNC…
One repetive issue I face is number of signals from MCU to/from IO that can be isolated. The the case below I want 7 digital signals and an isolated current sensor back, but I lack space for the 7th signal since one module is 25mm in width. One solution is to mount components on the…
CCU (Central Control Unit) is the name I give units that contain the core “brain” and only communication IO. The module below is an example of the core of a CCU with 3 external CAN ports, 8 internal module ports and 2 external Links. This is a fast MCU with a decent amount of speed, SRAM…
Minimal project box to hold a small PSU and Motherboard with 3 CAN ports. Tested a few boxes already so this will work out fine, but it is a lot of details to get right.
As we move a servo it would be more than nice to have a position feedback! The servo itself have a potentiometer telling the absolute position, but a standard Servo only have a 3 pin interface Power and Position setting – it gives no feedback. This is a common issue with many available actuators –…