Checklist for Preventive Maintenance of Different Machine Parts

1
Checklist for Preventive Maintenance of
Different Machine Parts
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• Preventive maintenance of machines and its every
  part is essential to ensure good quality output.
  By keeping a check on the machine parts, one can
  easily know if there is any problem and can
  subsequently prevent it from occuring. This way,
  you can save the ?nal output from getting
  damaged. You just need to replace or change the
  worn-out machine parts with the new one. Take
  care of gas pressure maintenance too. Parts like
  Hypertherm hpr260 parts and hypertherm hpr260
  consumables can help you in that.
• Checklist for Preventive Machine Maintenance
• 1. Clean the Torch Body
• Remove the torch parts to examine the inside part
  of the torch.
• Check if there is any sign of mechanical damage
  to threads.
• Clean the inside part of the torch with an
  electrical contact cleaner and a cotton swab.
• Disconnect the torch from the mounting tube and
  slide the tube back to see the torch-lead
  ?ttings.
• Check if there are any leakages or any damage to
  any of the connections.
• Blow out any accumulated metal dust inside the
  torch

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• 2. Clean the Torch Leads
• Wipe down or blow off the full length of the
  torch leads for removing the accumulated metal
  dust and dirt. Metal dust causes dissipation of
  the high voltage required to start the plasma
  arc.
• Check for kinked or worn hoses, cracked ?ttings,
  exposed wires, or other damage.
• Check high-frequency shielding to form a proper
  connection to earth ground.
• 3. Clean Out the Power Supply
• Blow out all the accumulated metal dust using
  clean, dry air. Because metal dust can cause
  damage to power-supply components, especially
• to the PC boards. Even the contactors, relays,
  and spark-gap assemblies can malfunction due to
  excess buildup of metal dust.
• Check all the air ?lters on the power-supply
  housing and replace if necessary.
• 4. Check Torch-Cooling Components
• With water-cooled torches, you should check the
  coolant stream in the tank for signs of reduced
  ?ow or aspirated air. Ensure that the return ?ow
  is set at the speci?ed gallons per minute. Check
  if the ?ow switches of the return line are
  functioning properly as insu?cient coolant ?ow
  causes the torch to overheat.
• Check if the coolant ?lters and pump screens
  function properly. Also, clean or replace if
  necessary.
• Check coolant resistivity by a conductivity
  meter. Resistivity should not exceed more than
  ten micro-ohms for most of the systems.
• Flush and replenish coolant every six months.

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• 5. Check Water Quality
• Secondary water quality is essential with
  water-injection torches. Water hardness should
  not exceed more than 8.5 ppm or 0.5 grains.
  Because hard water causes mineral deposits to
  build up on nozzles which leads to shortened
  life.
• Use a commercial water softener if required.
  Water quality in water tables is crucial.
  Because the water in the table is heavily
  contaminated with metal dust or slag, it can
  cause the hard-starting of the plasma torch. It
  may even cause rust accumulation on the cut
  pieces.
• 6. Check Plasma
• Gas quality is crucial and tricky to maintain
  good parts life and serve good cut quality. For
  this, hold a clean paper towel under the torch
  and start purging air through the system in the
  test mode to check air quality.
• Check for excess water, oil mist, or particulate
  contamination and clean if you ?nd any.
• Check ?lters weekly and empty moisture traps
  whenever they start to accumulate water.
• Also, make sure the gas quantity is neither more
  nor less than required. For this, you can use
  consumables like Hypertherm hpr260 consumable to
  ensure the gas quantity.

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• 7. Clean Machine Components Rails, Racks, Gears
• Use an abrasive pad and a degreasing agent to
  remove grease, dirt, and metal dust.
• Lubricate gears with a dry lubricant like
  graphite powder. If bearings have grease
  ?ttings, lubricate them too.
• Do not lubricate any rail sections as lubricants
  will attract contaminants that lead to excessive
  wear.
• Level and align rails.
• Check joints where the rail sections meet with a
  piece of tool steel for checking if it is not
  misaligning. Rail alignment will prevent any drag
  on drive motors. Distances between the rails
  should be kept constant across the entire length
  of the system.
• Align and adjust gears and bearings.
• Avoid the gears overlapping above or below the
  rack.
• Adjust gear alignments to remove ply between
  racks and gears. Make these adjustments for
  cross drives and rail and both. Alignment
  bearings need to have minimal ply between them
  and rail surfaces.
• These bearings are mostly mounted in an eccentric
  shape.
• Adjust them until no light is seen between the
  bearing and rail surface. Remember to not
  over-tighten the bearings.
• With drive gears disengaged, you need to roll
  the beam across the rails to check for binding.
  Adjust it accordingly until the beam rolls with
  little resistance and minimal vibration.

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• 8. Check Safety Limit
• Ensure operator safety with preventing damage to
  the machine. Check the machine to each limit
  even test the switches.
• Inspect mechanical stops to ensure that they are
  in proper working order.
• You can keep this checklist with you as a
  detailed guide to check machines regularly. This
  guide is to ensure that you do not miss any of
  its parts.
• Hypertherm hpr260 parts, powermax65 parts,
  Hypertherm hpr260 consumables, plasma cutting
  consumables, plasma cutting torch, etc., are
  some of the parts you can consider while
  replacing or changing machine parts.
• Source
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• entive-maintenance-of-different

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