From 9145c8f59f3c7ba7b7e5326fe7125110f5193130 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gu=C3=B0ni=20M=C3=A1r=20Gilbert?= <gudni.m.g@gmail.com>
Date: Sat, 11 Mar 2023 16:22:53 +0000
Subject: [PATCH] PFW-1504 too much?

I'm not happy with the current solution, I think we can improve it
by using the fact that this is a triangle wave. Need to think about it.
---
 Firmware/mmu2.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Firmware/mmu2.cpp b/Firmware/mmu2.cpp
index 5eb607e30..46da201ac 100644
--- a/Firmware/mmu2.cpp
+++ b/Firmware/mmu2.cpp
@@ -249,6 +249,25 @@ bool MMU2::VerifyFilamentEnteredPTFE() {
 
     TryLoadUnloadProgressbarInit();
 
+    /* The position is basically a triangle wave
+    // current position is not zero, so it is an offset
+    //              y(x)
+    //              ▲
+    //              │
+    //              │        ^◄────────── delta_mm - current_position
+    //              │       / \
+    //              │      /   \
+    //              │     /     \
+    //  machine     │    /       \
+    // position (mm)│   /         \
+    //              │  /           \
+    //              │ /             \
+    //              │/               \◄───────current_position
+    //              └───────────────────► x
+    //              0                19
+    //                   pixel #
+    */
+
     MoveE(delta_mm, MMU2_VERIFY_LOAD_TO_NOZZLE_FEED_RATE);
     MoveE(-delta_mm, MMU2_VERIFY_LOAD_TO_NOZZLE_FEED_RATE);