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Skiving Machine, Bell Knife, (Techsew SK-4) ID:184: Difference between revisions
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Skiving Machine, Bell Knife, (Techsew SK-4) ID:184 (view source)
Revision as of 10:09, 30 June 2024
, 30 JuneAdding instrucitons
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==Specs== | ==Specs== | ||
=== Manufacturer [https://www.techsew.com/en/techsew-sk-4-leather-skiving-machine.html claims]: === | |||
* Skives light and medium leather up to 8oz | |||
* Up to 2" adjustable skiving width | |||
* Integrated blade sharpener | |||
* Space saving table - only 33.5" wide | |||
* Variable speed 550W 1200 RPM servo motor | |||
==Usage== | ==Usage== | ||
{| class="wikitable" | |||
!<big>⚠</big> | |||
! | |||
# Always check <u>all</u> settings on the machine before each use - assume someone adjusted something. | |||
# Test on samples of similar material before working on important pieces | |||
# This machine uses a fast moving razor sharp blade. Do not put your flesh where the leather goes or all your blood will fall out. | |||
# This machine's servo drive retains a charge after powering off. Operate the pedal after turning off the power switch (the blade will spin) until charge is drained before removing any covers or performing any maintenance. | |||
|} | |||
=== Startup === | |||
Inspect, lubricate, clean, adjust/change accessories | |||
=== Operation === | |||
# Adjust depth stop to desired skiving width. | |||
# Raise clear cover and ensure drive wheel preload spring is hooked to drive wheel carriage. (Stowed when not in use). Lower clear cover. | |||
# Adjust drive wheel as close as possible to bell knife edge without touching. Drive wheel can be raised/lowered, and angled fore/aft until equal gap exists. | |||
# Lower presser foot lever, ensuring foot does not contact drive wheel. | |||
# Raise presser height with adjustment wheel to make enough room for leather thickness. | |||
# Power on machine with foot clear of pedal and hands clear of all moving parts. | |||
# Operate foot pedal until blade/drive wheel moves slowly - Inspect/listen for any maladjustment: | |||
## Any grinding/metal-metal contact indicates maladjustment - Stop Immediately. | |||
## Check drive wheel clearance/presser foot height for interference. Ensure sharpening stone is disengaged and retracted | |||
## If interference was with blade edge, sharpen blade. | |||
# '''Keep hands clear of blade intake area at all times.''' | |||
# Insert leather between foot and drive wheel, butted up against depth stop. | |||
# Adjust presser height while running at low speed until foot barely pushes leather into drive wheel. | |||
# '''Let the machine do the work. If it isn't feeding, readjust instead of pushing the leather.''' | |||
# Keeping hands clear of blade intake area: Guide leather under foot, gradually increasing in speed as comfort level increases. | |||
=== Sharpening blade === | |||
# Remove all material | |||
# Wear safety glasses and engage safety squints. Keep clear blade cover closed* | |||
## On occasion, sharpening stone will need to be dressed for roundness, requiring the cover to be opened. Caution, everything in there is sharp, or pinchy/grabby. See user manual for specifics. | |||
# Visually inspect through clear cover that the blue grinding wheel is not touching the bell knife. | |||
# Engage sharpening stone drive lever (far right) - pulse motor and visually confirm grinding wheel is spinning and not touching the bell knife. | |||
# Run motor at medium-high speed while slowly advancing wheel into knife until they make gentle contact. Less is more. | |||
# Once grinder makes contact with bell knife continue grinding for a short time (few seconds) until edge is honed. Do not overheat blade. | |||
# Retract grinding wheel (few rotations of adjustment knob). | |||
# Disengage sharpening stone drive lever (far right) | |||
# Non-Profit. | |||
=== Shutdown === | |||
# Power off motor - depress pedal to drain residual charge. | |||
# Raise presser foot lever. Never leave presser foot down while not in use. | |||
# If you need to clean the bell knife or drive wheel, disengage drive wheel carriage spring (under clear cover) | |||
# Using a brush or chopstick - not metal - NOT YOUR FLESHY FLESH HANDS - clear remnants from bell knife. | |||
# Use compressed air to clear debris from machine and work surface. | |||
# Close lid, sweep up, cover machine. | |||
==Troubleshooting== | ==Troubleshooting== | ||
Skived area uneven thickness: Drive wheel angle wrong, adjust to be even along entire length of wheel | |||
Does not skive - just cuts leather - Drive wheel too low, raise drive wheel | |||
Skives poorly/jagged/uneven feeding - Too much/too little pressure foot pressure, or blade dull. Sharpen blade, adjust foot. | |||
Top of leather damaged by presser foot - Presser foot too low, wrong angle. Adjust for less pressure, check angle is equidistant along drive wheel | |||
==Documentation== | ==Documentation== | ||