Replacing the bevel gear within the Tajima TFMX II-C1506 embroidery machine is a critical maintenance task requiring precision and adherence to safety protocols. This gear, typically found within the head assembly transmitting power from the main drive shaft to the needle bar drive mechanisms, is subject to wear over time. Failure can manifest as excessive noise, vibration, irregular stitch formation, or complete loss of needle bar motion. This procedure outlines the essential steps for safe and effective replacement. Exercise extreme caution: disconnect all electrical power sources and lock out/tag out before commencing any work. Wear appropriate personal protective equipment.
(how to change a bevel gear in a tajima tfmx ii-c1506 embroidery machine)
Commence by thoroughly cleaning the machine head exterior to prevent debris ingress. Access the gearbox housing typically requires removal of the machine head cover, often secured by screws around its perimeter. Carefully detach any associated wiring harnesses or connectors for sensors or lights, labeling them meticulously for reassembly. Locate the specific gearbox assembly containing the target bevel gear. This is frequently situated near the top or rear of the head, connected to the main drive shaft and the needle bar drive linkage.
The next phase involves disassembly to reach the faulty gear. This generally necessitates removing the driven component (often the needle bar drive shaft or its linkage) connected to the output of the bevel gear pair. This usually involves extracting retaining clips, set screws, or pins securing couplings or linkages. Carefully slide or unmesh the component. Subsequently, focus on the input side. The main drive shaft will typically be secured within the gearbox housing via bearings retained by snap rings or threaded end caps. Utilize appropriate snap ring pliers or wrenches to remove these retainers. The input shaft assembly, including its bearing and the attached drive bevel gear, must then be carefully extracted from the housing. Note the precise orientation and shimming; shims are critical for setting gear mesh preload. Document the arrangement meticulously.
With access gained, inspect both bevel gears (drive and driven) for damage: chipped teeth, excessive wear, pitting, or scoring. Replacement as a matched pair is highly recommended to ensure optimal meshing and longevity, even if only one appears damaged. Clean the gearbox housing cavity thoroughly using lint-free cloths and appropriate solvents, removing all old lubricant and metallic particles. Inspect bearings for smooth operation and replace if any roughness, play, or noise is detected. Inspect shaft seals and replace if compromised.
Installation of the new bevel gears demands precision. Begin by mounting the driven gear onto its shaft within the housing, ensuring it seats fully against any shoulders. Reinstall the output shaft assembly into the housing, securing bearings with their retainers (snap rings, end caps). Apply a thin film of the manufacturer-specified high-quality gear grease to the gear teeth. Carefully insert the input shaft assembly, ensuring the drive gear teeth correctly engage with the driven gear. Reinstall the input shaft bearing retainers. This is the critical stage for setting gear mesh preload and backlash. Refer meticulously to the Tajima service manual for the specific procedure and specifications for the TFMX II-C1506. This invariably involves reinstalling the original shims (or new ones as specified by the manual) in their exact locations and sequences between bearings and housing faces. Incorrect shimming leads to excessive noise, premature wear, or binding. Use a dial indicator to measure backlash if specified; preload is often set by feel during rotation and confirmed by torque measurement on the input shaft.
Once gear mesh is correctly established and all retainers are securely fastened, reconnect the output linkage or shaft to the needle bar drive mechanism, ensuring proper alignment and securing all pins, set screws, or clips. Reattach any wiring harnesses previously disconnected, verifying connections against labels. Reinstall the machine head cover. Before applying power, manually rotate the main drive shaft through several complete revolutions using the handwheel. This checks for smooth operation, absence of binding, and verifies no unexpected resistance.
(how to change a bevel gear in a tajima tfmx ii-c1506 embroidery machine)
Finally, reconnect electrical power. Initiate the machine in a slow operational mode, closely monitoring for unusual noises or vibrations emanating from the repaired gearbox. Gradually increase operational speed while continuing to monitor. Perform test embroidery runs on scrap fabric, scrutinizing stitch formation for consistency. Document the replacement procedure, parts used, and any adjustments made for future maintenance records. Successful bevel gear replacement restores smooth power transmission, ensuring precise needle bar movement and optimal embroidery quality. Adherence to OEM procedures and specifications is paramount.