has anyone tried the FSR sensors from tridprinting? i got them and hooked it all up and everything is blinking fine except the signal pin only changes .02 volts. im using a smoothie X5 on a custom delta. im not sure how much the signal pin is supposed to change but i figure more than that.
I am using the FSR kit from Ultibots on my delta, but it should be the same thing. Not in front of my computer at the moment, but the daughter board should just connect to your Smoothie’s Z-min endstop as a 3-pin setup I believe, rather than a normal 2-pin open/close configuration for endstops.
You might double check the wiring on the cable. Pretty sure it isn’t the standard found on RC Servos (s + -). I remember having to swap two wires on one end of my cable.
Good luck and happy holidays.
i double checked the wiring, the signal pin coming out of the FSR controller does not change when triggered. i think it may be faulty.
The signal is a pull down to GND when triggered. It must be pulled up to VCC with a 10k pullup resistor by the host (printer controller board). So I think it’s not faulty, just need to connect to the right controller input pin with pullup enabled.
so instead of using the signal pin frm the endstop controller, i use the vcc pin to the smoothie signal pin? i think that may fry my smoothieboard.
Not familiar with smoothie boards, but assuming you are already wired correctly, do you have the option when configuring your firmware to activate an internal resistor?
there are resistors but its not in the firmware. the signal wire from the endstop board goes to the Zmin endstop pin on the main board, right?
Yes, Zmin endstop signal pin sounds correct. What is the voltage between signal pin and GND on the smoothieboard? It should be near 5V normally and near 0V when the FSR board is triggered. Don’t connect VCC to the signal pin. I was trying to say that it’s normal to see very small signal pin voltage change on the FSR board if it’s not yet connected to the controller input with internal pullup.