Not all machines need to be reconditioned. This is a common misconception in the market. Buying a reconditioned machine allows you to invest in new wear and tear parts along with being offered a warranty and installation and training services when required. This allows new customers and edm experts alike the piece of mind that the machine you buy will allow you to run parts immediately and not spend time repairing or maintaining the machine. Many times we can locate very late model equipment with low usuage that does not need reconditioning. Also, there are many machines that have more hours, but are kept on a strict preventative maintenance program. We are very selective in the machines that we purchase for stock. Unlike our competitors, we are not afraid to pay more for a higher quality machine.

If you decide that buying a reconditioned machine is in your best interest, review the following four step process to better understand our process:

1. The first step is to clean the entire machine including the power supply unit and dielectic tank. During the cleaning process the upper and lower heads are either removed or disassembled for cleaning and inspection. During the clean up phase of submersible type machines we will remove the seal plate unit for inspection. The unit is cleaned and all wear items are replaced. In cases where power supply units are extremely dirty, we will disassemble the power supply unit and clean all printed circuit boards.

2. Once the machine, power supply and dielectric unit are clean, we then reassemble the machine tool and any other parts disassembled during the cleaning process. During this phase, we would replace standard wear items such as diamond guides, carbide contacts, power feeder cables depending on the condition of these items. Once the machine is reassembled we install the machine under power.

   Once the machine is under power, our technicians check the entire machine for any problems. The major areas that are evaluated include:

   1. Wire drive unit-rollers and pulleys checked for abnormal wear, all bearings and moving parts (including wire drive motor) checked for any abnormal play, operation and noise.

   2. Pumps checked for any leaks, noise, or operational problems.

   3. Servo motors checked for noise or vibration at this time the limits are checked for proper position and operation.

   4. Chiller (if applicable) is run and checked for compressor integrity and refrigerant charge.

   5. Ball screws in x, y, u, v, (z) axes are checked. All screws are checked for wear by using an indicator to check repeatability at different positions on each screw. If repeatability is an issue, most machines allow for compensation for normal wear (backlash) on the ball screw. We will enter the appropriate compensation in the control to correct the positioning error. If the wear is excessive and can not be compensated for in the computer, then the screw will be removed. At this point, the screw will either be sent out for rebuilding or a new screw will be installed; if a new screw is installed the machine will have to be laser calibrated. In some cases or on request, we will laser calibrate the machine.

   6. Table is checked for flatness and parallelism.

   Once the evaluation is complete any problems found are repaired and new parts installed as required.

3. Once the tool is operational and any repairs are made, we will then prepare for a test cut. All tools are filled with dielectric fluid. Benchmark test cuts are done to ensure proper cutting speeds,overburn, and accuracy. Proper outputs are checked on rough and skim cuts. Any issues or problems found are taken care of at this point.

4. Once the test cut is done any final adjustments or repairs are made, and the machine is ready for demo purposes and/or shipment to one of our customers.