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Type: Posts; User: Bdrangdo

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  1. Replies
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    2,168

    Re: My Take on a DIY Vertical Mill

    I have just posted a practical working design for a VMC using standard compononents and linear rails on Grabcad. It was modelled in Solidworks but I also included step files that shoud work on any...
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    1,385

    Re: Servo motor vipration and not stable

    Backlash is term used to describe excessive clearances caused by worn bearings or ball screws and nuts. When the backlash becomes too great it can cause the servo to vibrate and shake. You can easily...
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    1,385

    Re: Servo motor vipration and not stable

    Check for worn ball screw or bearings, backlash can cause servo motor to hunt or vibrate.
  4. Re: Question about AC servo motor type Alpha C

    Shorted windings on an AC servo usually makes the shaft hard to turn by hand or feel lumpy. Dave
  5. Re: Bridgeport Interact 412 w Heidenhain 151 Controller stops mid program

    Assuming the drives are DC it sounds like there is a brush sticking or worn out in a servo motor, probably the "X" axis. Depending on the program one faulty axis will stop the others from running...
  6. Re: What would cause a SEM DC servo to stop free spinning

    I had a SEM motor lock up like that for no obvious reason, when I opened it up one of the magnets had detached itself from the frame and stuck itself to the rotor, it had not been dropped or abused...
  7. Thread: LCD Monitor

    by Bdrangdo
    Replies
    60
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    19,059

    Re: LCD Monitor

    There are very cheap video signal adapters for sale on Ebay, less than £20 GDP, they are designed for use on the older non standard video standards that were used on early arcade machines and convert...
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    3,015

    Re: Solidworks Spur Gear Generator

    For all practical purposes parts generated by the Toolbox are read only, they can not be modified. I find the easiest way round the problem is to save the part as a "dumb" file and then reopen it. I...
  9. Thread: 8055/B-M

    by Bdrangdo
    Replies
    2
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    1,132

    Re: 8055/B-M

    Default baud rate for both the Fagor control and WinDNC is 9,600, ie P000 = 7. I always seem to get best results with that, maybe there is a problem with cross talk at higher speeds. Dave
  10. Replies
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    663

    Re: MAHO 1000C -84

    I am not familiar with that machine but if the encoder is on the servo motor which they often are the motor could be turning without moving the table. Check for a broken belt or a broken or slipping...
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    2,162

    Re: TNC407 Machine Parameter Save

    You will also need to wire in the fixed emergency stop to provide a 24v input to the correct input pin because the resultant error code will make it unusable without an active Estop circuit. It is...
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    810

    Fagor 8055i compact flash card

    I have a 8055i controller that has the CF card mounted on the front of the panel and I believe this can be used to transfer programs however the only laptop I have that will take PCMCIA cards can't...
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    721

    Changing screen colours

    I bought a Fagor 8055i control with a monochrome LCD with a very dim backlight so I decided to fit a colour LCD screen that I bought off Ebay and was the right size, I had to guess the colour data...
  14. Replies
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    924

    Re: Lubrication for Hobby CNC Machine

    I have always understood that EP or hypoid oils should never be used in gearboxes that used bronze or brass components because the additives can react badly with these metals, I assume this is true...
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    1,066

    Re: Fagor 8055 Control handwheel

    I was referring to a socket on the axis module, if it is a 8055i it will be marked X5, the earlier 8055 model uses X5 or X6 depending on parameter setting, it is all in the documentation along with...
  16. Replies
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    1,066

    Re: Fagor 8055 Control handwheel

    Check out Fagor Automation's website, you can download all the OEM manuals for free. Yes you can easily add a hand wheel, there is a dedicated socket for one. The cheap and cheerful Ebays ones will...
  17. Re: Double ball nut worth it for long C7 grade rolled ball screw?

    I wrapped a thin piece of shim steel around the two halves and locked it into place using jubilee clips, that way you can loosen one side and effectively adjust the preload by turning one half...
  18. Re: Double ball nut worth it for long C7 grade rolled ball screw?

    I used an angle grinder mounted onto the tool post of my lathe with a 4 1/2 inch x 1mm slitting disc and carefully plunged it in, it only took a minute or so. The nuts on that size of screw appear to...
  19. Re: Double ball nut worth it for long C7 grade rolled ball screw?

    I have a Bridgeport with 32 mm ball screws and the X axis is worn and there was some backlash, there was no room for an additional nut so I sliced the original nut into two halves giving two ball...
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    Re: TNC 155Q Problem

    It means the memory checksum does not match. probably caused by a flat battery, you will have lost your programs and parameters as well as your tool table and offsets.
  21. Replies
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    1,958

    Re: Fago 8055 2000 External Emergency actived

    If I1 is activated then the error message must be generated by the PLC. The Fagor 8050/55 has a soft key that allows you to read the active PLC program as well as the PLC listing. Some lines will be...
  22. Re: Adding Vintage Milliamp meter to laser cutter

    The initials "FS" refer to the full scale movement of the meter which in this case is 1 milliampere. You could try measuring the resistance across the meter and work out what the shunt resistor...
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    824

    Re: Does a Sem motor have a brake ?

    I forgot to add that most servo brakes are by default on, ie they require power to release, spring pressure is used to apply the brake, so if the motor shaft is free to turn then it is unlikely to...
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    824

    Re: Does a Sem motor have a brake ?

    I have never seen a SEM servo motor with a brake, maybe there is one on the "Z" axis. Just look inside the terminal box and look at the connections, there will be 2 thick wires for the motor, 2 thin...
  25. Re: Update DOS application for sending NC files

    Try WinDNC, you can download it free from Fagor Automation and other places, it is designed for Fagor controls but should work with others. Dave
  26. Replies
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    899

    Re: Modifying the PLC

    I managed to get into the PLC program it was a matter of changing the attributes to -mx which allows the program to be read and modified. The other main issue is the software does not give the full...
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    Modifying the PLC

    Just bought an old 8055i control with a plan to fit it to a Bridgeport, I need to either modify the existing PLC program or delete it altogether and start afresh. The problem is that it seems to be...
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    Re: Cleaning Linear Glass Scales

    I have used brake cleaner in the past simply because it was all I had and because of the straw on the aerosol can it is easy to get inside and then a quick blow off with compressed air.
  29. Re: New Servo Drives for Old Home built machine

    Brushed DC motors will be even larger than the DMM motors for the same torque, even more so if they have tacho's fitted which you will need if you are using velocity control. Dave
  30. Thread: fagor 8055 tc

    by Bdrangdo
    Replies
    6
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    3,429

    Re: fagor 8055 tc

    The 8055 eprom model uses a different rs232 connection to the later 8055i. Pin 2 goes to pin 2 and pin 3 goes to pin 3. They are usually reversed. The 8055i has extra parameters but is otherwise...
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