W Axis Endstop
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Correction
pin 4 E2_Stop (i think this is the one that gets mapped to the W axis, correct?)
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Am I correct?
The endstop order is:
U is E0_STP
V is E1_STP
W is E2_STP
A is E3_STP
B is E4_STP
C is E5_STPAs a side note I am using the IR probe so the Z_STP has nothing connected to it.
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In the current firmware, unfortunately that isn't going to work, because endstops 5-9 are read through the SX1509B on the DueX board. I will look at an alternative solution for when there is no DueX board present.
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I'm not sure i understand.
Although the pins in the documentation for the expansion header are listed as E2_STOP, E3_STOP, etc. They are un-available? The Pins 4,11,14,19 & 24 do nothing?
Looking in the schematics on Github, I can see the DueX shows the SX1509B .
Could I obtain one of the sparkfun boards based in the SX1509B to add these inputs?Another option, maybe. I am running the breakout board as I have closed-loop drivers and motors (steppers with an encoder) that require the step and direction signals. I had ordered a DueX5 f/w V0.8 with my Duet. I was under the impression that i could not use the external drives with that expansion board. The documents on Github indicate that "The E2-E5 testpoints are not required for ATE however they do provide a point for users to add step/dir/enable headers for external drivers in extrimis". I assume that the exclusion of E6 is a typo as I see the pads for E6.
I am happy to solder headers onto those points, if it is possible. I am assuming these are 3.3v logic on those points?
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Whoops, wiki shows 4,11,14,19 & 24 as stops on the JPG expansion header .jpg. The document on github shows them as the inputs for the SX1509B.
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I've added headers to the step/dir/en pads on the DueX5. Assuming its 3.3v logic, I've added a logic converter to get the signals step/dir signals to external drives to 5V.
No motion. Do i need to change something in the config now that i've switched to the DueX5?
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As stated clearly in the wiki, you cannot use those test pads on a DueX5 to connect external drivers. On a DueX2 you can connect external drivers to the 3 sets that have no stepper driver chip connected.
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Ok, plan B.
What about adding the Adafruit SX1509 board to get the extra IO? Is that possible as-is?
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Ok, found the wiki section about the SX1509. That all looks easy.
Do i need to do anything special to configure the I/O 0 as an input or I/O 15 as an output?
Based on the documentation, pin 27 of the SX1509 is I/O 0 and that maps to the E2_Stop which would be the W axis end stop. Correct?
Also, I have filament monitor sensors that I'd like to connect, but M591 only accepts endstops on the main board, not through the expansion board or IO. How can this be accomplished I am using all endstop connections already (X,Y,Z,U,V and I have a PanelDue so 10-11 are out also)?
One last question or maybe a future request. It looks like the SX1509 boards can be daisy chained up to 4 of them together. Not that I need any more IO than a single card could provide, it may be nice down the road.
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In firmware 1.21RC1 the additional endstop pins on the Duet expansion connector should work when there is no DueX board connected.
