Topics created by fmeleard

@fmeleard

Is the time required to repeatedly home going to add a significant amount to the total "print" time?

If not I think you should simply accept having to home to the existing endstop.

The problem with an endstop in the middle is that the starting position for homing could be to either side of the endstop. How can you determine which direction to move?

One possible solution would be to implement a closed loop control system where the actual position is always known.

Frederick

@dc42 @deckingman Thanks for your feedback
Concerning the analysis, with my Raspberry, I get a pretty accurate analysis (a few millimeters)...

In this case, if I understand correctly, the simplest thing would be to analyze the distance with the Raspberry, and to send the displacement via my python program in Gcode...

This is a possibility.

Otherwise, for my need of height analysis (outdoors for a max distance of about 90 cm) without need of accuracy higher than a millimeter, would you have a tip for a probe more adapted to the Duet3?

Francis

@dc42 @dc42 Hello,
yes the connections are well on IN and GND and I have good feedback but not very precise.

I tested with the following options:
m308 s0 y "thermistor" p"^io6.in"
m308 s0 y "linear-analog" p"^io6.in"
m308 s0 y "linear-analog" p"!io6.in"
m308 s0 y "pt1000" p"!io6.in"
m308 s0 y "pt1000" p"^io6.in" T100000 B4725

I have some reactions but they seem strange, because for example I go from "Sensor 0 type PT1000 using pin !io6.in, reading 58.6 , last error : success, R:2200.0 L:0 H:0" to Sensor 0 type PT1000 using pin !io6.in, reading 2000.00 , last error : success, R:2200.0 L:0 H:0.

Which type should be used?
Is there any way to calibrate more or less the reading?

Thank you very much

@dc42 Problem solved

My motors were on 800 ma when they should be on 3A... So, they did not seem to hold the position ...

Now the steppers stay well in place

Thanks a lot for your help