qtdragon/hd -add details of spindle belts embedded panel example

Author: c-morley

docs/src/gui/images/qtdragon_spindle_belts.png

@@ -176,6 +176,11 @@ The `EMBED_TAB_NAME` entry will used as the title for the new tab.(must be uniqu
 Tab `EMBED_TAB_LOCATION` options include: `tabWidget_utilities`, `tabWidget_setup` and `stackedWidget_mainTab`. +
 Tab `EMBED_TAB_COMMAND` specifies what embed-able program to run, including any of it's command line options.
 
+If using the `tabWidget_utilities` or `tabWidget_setup` locations, an extra tab will appear with the panel. +
+If using `stackedWidget_mainTab`, a button labelled 'User' will appear. +
+Pressing this button will cycle through displaying all available panels (specified for this location) on the main tab area.
+
+==== Embedding Vismach Mill
 .Sample adding a builtin panel to the utilities tab, i.e., a graphical animated machine using the vismach library.
 [source,{ini}]
 ----
@@ -185,9 +190,18 @@ EMBED_TAB_COMMAND = qtvcp vismach_mill_xyz
 EMBED_TAB_LOCATION = tabWidget_utilities
 ----
 
-If using the `tabWidget_utilities` or `tabWidget_setup` locations, an extra tab will appear with the panel.
-If using `stackedWidget_mainTab`, a button labelled 'User' will appear.
-Pressing this button will cycle through displaying all available panels (specified for this location) on the main tab area.
+==== Embedding Spindle Belts Panel
+
+This example panel is designed to display additional RS485 VFD data and also to configure a 4 sheave, 2 belt spindle drive via a series of buttons.
+
+image::images/qtdragon_spindle_belts.png["QtDragon spindle_belts Panel - Spindle Belts VCP",align="center"]
+[source,{ini}]
+----
+[DISPLAY]
+EMBED_TAB_NAME = Spindle Belts
+EMBED_TAB_COMMAND = qtvcp spindle_belts
+EMBED_TAB_LOCATION = tabWidget_utilities
+----
 
 === Subroutine Paths