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--- 5_25_floppy_drives:ye_data_yd-380 [2021/06/11 08:57] – created js
+++ 5_25_floppy_drives:ye_data_yd-380 [2021/06/13 19:20] (current) – [Type 1711] js
@@ Line 31: / Line 31: @@
 The 1711 type uses the Yaskawa GCMK-77X or Sankyo E2SLR3 motor board.
 === Pictures ===
-| {{:5_25_floppy_drives:ye_data_yd-380:1711_back.jpg?200 |}} | {{:5_25_floppy_drives:ye_data_yd-380:1711_top1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_top2.jpg?200 |}} | {{:5_25_floppy_drives:ye_data_yd-380:1711_bottom1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_bottom2.jpg?200 |}} |
+| {{:5_25_floppy_drives:ye_data_yd-380:1711_back.jpg?200 |}} | {{:5_25_floppy_drives:ye_data_yd-380:1711_top1.jpg?200 |}} {{:5_25_floppy_drives:ye_data_yd-380:1711_top2.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_top3.jpg?200 |}} | {{:5_25_floppy_drives:ye_data_yd-380:1711_bottom1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_bottom2.jpg?200 |}} |
 | {{:5_25_floppy_drives:ye_data_yd-380:1711_front1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_front2.jpg?200 |}} | ::: | ::: |
-| {{:5_25_floppy_drives:ye_data_yd-380:1711_pcb1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_pcb2.jpg?200 |}} | ::: | ::: |
+| {{:5_25_floppy_drives:ye_data_yd-380:1711_pcb1.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_pcb2.jpg?200 |}} \\ {{:5_25_floppy_drives:ye_data_yd-380:1711_pcb3.jpg?200 |}} | ::: | ::: |
 ==== Type 1718 ====
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 ++++
+===== Modifications =====
+==== 84 track seeking ====
+Unmodified drives will not be able to seek 84 tracks. A major modification is required to enable this.
+{{:5_25_floppy_drives:ye_data_yd-380:mod_84tracks_1.jpg?200|}}
+{{:5_25_floppy_drives:ye_data_yd-380:mod_84tracks_2.jpg?200|}}
+The modification can be performed by following these steps:
+  - Unscrew the springs that hold the head assembly guild rod on the stepper motor side.
+  - Pull out the guide rod about half way.
+  - Use a rotary tool to grind down the head assembly end stop as pictured.
+  - Clean the drive of any metal dust.
+  - Push the guide rod back into its resting position.
+  - Screw down the springs that hold the guild rod in place.