Differences

This shows you the differences between two versions of the page.

--- equipment:metalshop:metallathe:tdi [2024/04/05 10:44] – ralawrence
+++ equipment:metalshop:metallathe:tdi [2024/11/19 21:42] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Thread Dial Indicator ======
+==== Thread Indicator Dial ====
 {{:equipment:metalshop:metallathe:tdi.jpg?400|}}
-We have a custom designed 3D printed Thread Dial Indicator (TDI). It is works exactly the same as the original manufacturers dial so the {{ :equipment:metalshop:metallathe:harrison_m250_machine_manual_enhanced.pdf |PDF of Harrison M250 Manual}} can be used as a reference. There are in fact two TDIs a Green one with a 20 tooth drive cog and a Blue one [COMING SOON] with a 21 tooth drive cog. Which one you use depends on the pitch of the thread you are wanting to cut, see table below.
+We have a custom designed 3D printed Thread Indicator Dial (TID). It is works exactly the same as the original manufacturers dial so the {{ :equipment:metalshop:metallathe:harrison_m250_machine_manual_enhanced.pdf |PDF of Harrison M250 Manual}} can be used as a reference. There are in fact two TIDs a Green one with a 20 tooth drive cog and a Blue one with a 21 tooth drive cog. Which one you use depends on the pitch of the thread you are wanting to cut, see table below.
+The TID is normally not left fitted to the Lathe to reduce ware.
-The TDI is normally not fitted to the Lathe to reduce ware.
+All design files for making the TIDs are available at https://www.thingiverse.com/thing:6566719
-==== To fit the TDI:- ====
+==== To fit the Thread Indicator Dial:- ====
-  * Ensure the metal bolt is screwed back in to the body of the TDI.
+  * Ensure the metal bolt is screwed back in to the body of the TID
   * Place the locating lug in the locating hole on the right hand side of the Carriage.
 {{:equipment:metalshop:metallathe:carriage.jpg?200|}}  {{:equipment:metalshop:metallathe:locatinglug.jpg?200|}}  {{:equipment:metalshop:metallathe:start.jpg?200|}}
-  * Rotate the TDI so as to bring the teeth of the cog to mesh with the Lead Screw.
+  * Rotate the TID so as to bring the teeth of the cog to mesh with the Lead Screw.
 {{:equipment:metalshop:metallathe:start3.jpg?200|}}  {{:equipment:metalshop:metallathe:start2.jpg?200|}}
   * Now screw the bolt in to the threaded hole and tighten firmly with 6mm Allen key.
-  * Please remove the TDI when you have finished using it.
+  * Please remove the TID when you have finished using it.
-==== Which TDI to use:- ====
+==== Which Thread Indicator Dial to use:- ====
 {{:equipment:metalshop:metallathe:whichtpi.jpg|}}
-Best guess is that when using the M setting use the BLUE TPI with 21 tooth gear otherwise use the GREEN TPI with 20 tooth gear
+It would appear that when using the M setting you need to use the BLUE TID with 21 tooth gear otherwise use the GREEN TID with 20 tooth gear
-==== How to use TDI:- ====
+==== How to use Thread Indicator Dial:- ====
 Ensure you have engaged the Leadscrew Clutch.
 {{:equipment:metalshop:metallathe:leadscrewclutch.jpg?200|}}
+Be very careful when thread cutting the carriage can move very fast towards the Headstock or Tailstock.
 **To do**{{:equipment:metalshop:metallathe:dial.jpg?200|}}