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  • Users: DominicASP
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  1. DominicASP

    Water concentration in air in terms of PPMV

    I am trying to find the water concentration in ppmv of an air mixture and determine the effect of lowering the total pressure of the mixture on this water concentration. Firstly, I would like to know if the formulas used to find the ppmv value are correct. Here's my procedure: Working...
  2. DominicASP

    Water PPMV value in air and effect of pressure

    I am trying to find the water concentration in ppmv of an air mixture and determine the effect of lowering the total pressure of the mixture on this water concentration. Firstly, I would like to know if the formulas used to find the ppmv value are correct. Here's my procedure: Working...
  3. DominicASP

    End Mill Jamming in Aluminum during CNC milling Attempts

    I just bought a Chinese 3040 230W engraving CNC machine and have recently been struggling with milling operations on aluminium as you can see on my previous forum posts. I am trying to cut through a 4.3 mm thick aluminium box with a TiN coated carbide 2 flutes 42degree end mill with the...
  4. DominicASP

    Newbie - Need Feedback on my first CNC Milling attempt

    I just bought a small three-axis Chinese CNC machine, the 3040Z-DQ. I have no experience with CNC milling or any other machining operations. I am trying to cut a 0.56 in (14.3 mm) by 0.52 in (13.3 mm) rectangular profile through a 1/20 in (1.27 mm) aluminium plate. I am not sure which type of...
  5. DominicASP

    Problems with my new Chinese CNC

    I just bought a Chinese 3040Z-DQ 230W Four Axis Ball Screw CNC and followed the instruction from the manual to configure the machine with Mach3. I started testing the machine with simple X Y Z commands using Mach3 and my keyboard and noticed some really rough noise and experienced motor...

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