docs: fix broken links in plasma

Author: phillc54

docs/src/plasma/plasma-cnc-primer.adoc

@@ -88,7 +88,7 @@ With the release of the Mesa THCAD voltage to frequency interface, LinuxCNC was
 
 Jim Colt of Hypertherm is on record saying that the best THC controllers were fully integrated into the CNC controller itself. Of course he was referring to high end systems manufactured by Hypertherm, Esab, Thermal Dynamics and others such as Advanced Robotic Technology in Australia, little dreaming that open source could produce systems using this approach that rival high end systems.
 
-The inclusion of external offsets in Linuxcnc V2.8 allowed plasma control in LinuxCNC to rise to a whole new level. External Offsets refers to the ability to apply an offset to the axis commanded position external to the motion controller. This is perfect for plasma THC control as a method to adjust the torch height in real time based on our chosen process control methodology. Following a number of experimental builds, the <<cha:qtplasmac,QtPlasmaC>> configuration was incorporated into LinuxCNC 2.8.
+The inclusion of external offsets in Linuxcnc V2.8 allowed plasma control in LinuxCNC to rise to a whole new level. External Offsets refers to the ability to apply an offset to the axis commanded position external to the motion controller. This is perfect for plasma THC control as a method to adjust the torch height in real time based on our chosen process control methodology. Following a number of experimental builds, the Plasmac configuration was incorporated into LinuxCNC 2.8. link:./qtplasmac.html[QtPlasmaC] has superceded Plasmac in LinuxCNC 2.9.
 This has been an extremely ambitious project and many people around the globe have been involved in testing and improving the feature set. QtPlasmaC is unique in that its design goal was to support all THCs including the simple bit bang ones through to sophisticated torch voltage control if the voltage is made available to LinuxCNC via a THCAD or some other voltage sensor. What's more, QtPlasmaC is designed to be a stand alone system that does not need any additional G-Code subroutines and allows the user to define their own cut charts that are stored in the system and accessible by a drop-down.
 
 == Arc OK Signal
@@ -488,7 +488,7 @@ Stepper motors suffer from resonance and a direct drive pinion is likely to mean
 
 == QtPlasmaC LinuxCNC Plasma Configuration
 
-The <<cha:qtplasmac,QtPlasmaC configuration>> which is comprised of a HAL component (plasmac.hal) plus a complete configurations for the QtPlasmaC GUI has received considerable input from many in the LinuxCNC Open Source movement that have advanced the understanding of plasma controllers since about 2015. There has been much testing and development work in getting QtPlasmaC to its current working state. Everything from circuit design to G-Code control and configuration has been included. Additionally, QtPlasmaC supports external THC's such as the Proma 150 but really comes into its own when paired with a Mesa controller as this allows the integrator to include the Mesa THCAD voltage to frequency converter which is purpose built to deal with the hostile plasma environment.
+The link:./qtplasmac.html[QtPlasmaC] which is comprised of a HAL component (plasmac.hal) plus a complete configurations for the QtPlasmaC GUI has received considerable input from many in the LinuxCNC Open Source movement that have advanced the understanding of plasma controllers since about 2015. There has been much testing and development work in getting QtPlasmaC to its current working state. Everything from circuit design to G-Code control and configuration has been included. Additionally, QtPlasmaC supports external THC's such as the Proma 150 but really comes into its own when paired with a Mesa controller as this allows the integrator to include the Mesa THCAD voltage to frequency converter which is purpose built to deal with the hostile plasma environment.
 
 QtPlasmaC is designed to stand alone and includes the ability to include your cutting charts yet also includes features to be used with a post processor like SheetCam.
 

docs/src/plasma/qtplasmac.adoc

@@ -4065,7 +4065,7 @@ An effective and very reliable method of obtaining an Arc OK signal from a plasm
 
 This assembly will now act as a relay that will switch on when current is flowing through the work lead which only occurs when a cutting arc has been established.
 
-This will require that QtPlasmaC be operated in Mode 1 rather than Mode 0. See the <<qt_ini-mode, INI File>> and <<qt_mode, QtPlasmaC Modes>> sections for more information.
+This will require that QtPlasmaC be operated in Mode 1 rather than Mode 0. See the <<qt_mode, QtPlasmaC Modes>> sections for more information.
 
 image::images/qtplasmac_reed_arc_ok.png[width=600,align="center"]