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en:manuals:service-notes-for-mitail [2025/11/02 21:30] – darkgrueen:manuals:service-notes-for-mitail [2025/12/04 03:11] (current) – [Installing Cable Pullies / Servo Horns] darkgrue
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 ===== Introduction ===== ===== Introduction =====
  
-These instructions do not purport to cover all details or variations of the product and do not claim to provide for every possible contingency in connection with installation, operation, or maintenance. Self-repairs performed by the customer may lead to damage or loss of your product. Should further information be desired or should particular problems arise which are not covered sufficiently or if repair services are desired, please contact The Tail Company ([[contact@thetailcompany.com]]).+These instructions do not purport to cover all details or variations of the product and do not claim to provide for every possible contingency in connection with installation, operation, or maintenance. Self-repairs performed by the customer may lead to damage or loss of your product. Should further information be desired or if repair services are desired, please contact The Tail Company ([[contact@thetailcompany.com]]).
  
 For the purposes of this manual, “left” and “right” references will refer to the MiTail’s orientation when worn on the body, relative to the wearer. So, the “left” side is the side of the MiTail on the wearer’s left. For the purposes of this manual, “left” and “right” references will refer to the MiTail’s orientation when worn on the body, relative to the wearer. So, the “left” side is the side of the MiTail on the wearer’s left.
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 ==== Case Replacement ==== ==== Case Replacement ====
  
-Replacing the lower case half (with the belt hook portion) is the most common reason for replacing the MiTail case. This requires that the case be opened, the two batteries taken out of the case, the control board removed, the four servo frame mount screws be removed, and the servo pulley be removed from the servo. The cable must be removed from the pulley to remove the case half from the cable.+Replacing the lower case half (with the belt hook portion) is the most common reason for replacing the MiTail case.  
 + 
 +<WRAP round tip 90%> 
 +Before starting, read all the sections of this guide. Take photos or videos of your disassembly, to assist you in reassembling the tail. The sections that most users have are in the area of setting the servo home position, reassembling the control board to the case, and reassembling the case halves. Tips have been provided for each of those trouble areas.</WRAP> 
 + 
 +This requires that the case be opened, the two batteries taken out of the case (they may stay attached to the control board), the control board removed from the case half, the four servo frame mount screws be removed to free both servos and the tail spine from the case half, and the servo pulley be removed from the servo (one screw in the center). The cable must be removed from the pulley (requiring 7 screws removed from the pulley) to remove the case half from the cable.
  
 The disassembly is then reversed. Note the procedure in [[#Resetting Servo Home Position]] to reset the pulley position on the servo shaft correctly. The disassembly is then reversed. Note the procedure in [[#Resetting Servo Home Position]] to reset the pulley position on the servo shaft correctly.
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 </WRAP> </WRAP>
  
-If a fresh servo is being installed, you will first need to modify the replacement servo to remove the mounting tab furthest from the servo shaft (so that it can fit into the case).+If a "fresh" servo (shown in top of photo) is being installed, you will first need to modify the replacement servo to remove the mounting tab furthest from the servo shaft so that it can fit into the case (shown in bottom of photo).
  
 {{ :en:manuals:servo_tab_cut.jpg?400 |}} {{ :en:manuals:servo_tab_cut.jpg?400 |}}
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-==== Resetting Servo Home Position ====+===== Installing Cable Pullies / Servo Horns ===== 
 + 
 +There are seven screws holding the pully assembly halves together. Three are at the edge, near the cable slot. And four more that hold the servo horn to the pully. All seven must be removed or loosened to free the cable from the pulley (which is required if the case is being replaced). The screws are M3 × 5.75 mm, Pozidriv PZ1 drive, 7.75 mm overall length. 
 + 
 +<WRAP round important 90%> 
 +Note that the pulley screws are soft metal. Using a medium-sized electric screwdriver that's slow and steady with very firm downward pressure so the bit doesn't skip and grind out the heads. Do not install or remove the screws with the pulley attached to the servo to avoid damaging the servo shaft and/or gearbox. 
 +</WRAP> 
 + 
 +==== Pully Calibration / Resetting Servo Home Position ====
  
- To do this correctly, first power up the PCB with the new servo attached directly to the board. That will center or "home" the servo before you reattach the pulley. Secondly, make sure the pulley is in the following "ten minutes to the hour" position; the topmost screw head will also align with the servo mount rib below it (note that the servo splines may not line up perfectly and may land a tooth to the left or the right slightly or a particular trail might bias more towards the center screw):+To do this correctly, first power up the PCB with the new servo attached directly to the board. That will center or "home" the servo before you reattach the pulley. Secondly, make sure the pulley is in the following "ten minutes to the hour" position; the topmost screw head will also align with the servo mount rib below it (note that the servo splines may not line up perfectly and may land a tooth to the left or the right slightly or a particular trail might bias more towards the center screw):
  
 {{ :en:manuals:pulley_alignment.jpg?nolink&600 |}} {{ :en:manuals:pulley_alignment.jpg?nolink&600 |}}
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 ===== Board-level Repairs and Modifications ===== ===== Board-level Repairs and Modifications =====
  
-The tail PCB uses small surface-mounted components, and is not generally considered a repairable unit (replacements are available for order from The Tail Company).+The tail PCB uses small surface-mounted components, and is not generally considered a repairable unit. Replacements are available for order from The Tail Company.
  
 <WRAP round important 90%> <WRAP round important 90%>
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 ===== Charging ===== ===== Charging =====
  
-MiTail requires a USB Power Delivery (USB PD) capable charging adapter. PD charging is only possible using a USB-C to USB-C cable and a USB PD chargers together. Adapters with USB-A output, even with a USB-A to USB-C cable will **NOT** charge a MiTail. The adapter should provide at least 9V - almost all PD adapters can. If the adapter's rated power is less than 24W, charging will take around 3 hours.+MiTail requires a USB Power Delivery (USB PD) capable charging adapter. PD charging is only possible using a USB-C to USB-C cable and a USB PD chargers together. Adapters with USB-A output, even with a USB-A to USB-C cable **WILL NOT** charge a MiTail. The adapter should provide at least 9V - almost all PD adapters can. If the adapter's rated power is less than 24W, charging will take around 3 hours.
  
 <WRAP round tip 90%> <WRAP round tip 90%>
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