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Type: Posts; User: CitizenOfDreams

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  1. Replies
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    Re: DIY probe - a different approach

    Seven years later, I'm still using my Poor Man's Probe. :wave:

    Here is the current version:

    https://i.ibb.co/cycCs4h/2023-11-08-16-23-00.jpg
  2. Re: I created a Virtual XP machine but...

    What software are you using, Oracle VirtualBox? If so, make sure you have the right Network type in the virtual machine settings. You want "Bridged Adapter" (not "NAT", which is the default).

    Also...
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    Re: Path doesn't make sense.

    When I import your G-code in CamBam, it shows perfect arcs ending at Y=0. So the code is fine, must be an error in the simulation.
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    Re: MOUSE POINTER SIZE

    Go to Control panel - Mouse - Pointers - Scheme. Select one of the "Large" or "Extra large" schemes and click Apply.
  5. Re: HELP WITH WIRING PROXIMITY SENSORS AS HOMING AND LIMIT SENSOR

    Try the proximity sensors again when you have a chance. They are really awesome devices, you will love them. :wave:

    The schematic in your first post is correct. It should work if all the...
  6. Re: HELP WITH WIRING PROXIMITY SENSORS AS HOMING AND LIMIT SENSOR

    Judging by the symptoms, you have connected the Zener diode backwards.
  7. Re: Servo motor help with weird cable connector

    Those connectors have spring contacts. A special tool (looks like a thin awl) is inserted into the rectangular opening to release the wire.

    You can buy the tool, or make one yourself with an old...
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    Re: Spindle Control with PWM PSU

    The short answer is no, you cannot control this PSU with a breakout card. It is cheap for a reason.

    The "exciter" output goes to the excitation winding (for special motors where that winding has...
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    Re: conveyor problem

    I'm not familiar with your particular machine, but typically there is an overload protection relay between the motor and the contactor. Find that relay and see if it has tripped. If so, reset the...
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    Re: Fuji IGBT equivalent

    Check eBay, there are quite a few Fuji modules for sale, both new and used.

    Also, Fairchild FMG2G150US60 has the same package and similar electrical specs, if you can find one.

    Just a reminder...
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    Re: Help on PCB design layout

    It was just a prototype, but it came out so well that I didn't bother making a PCB for it. The device worked for many years in the form of a breadboard. :wave:

    On the topic of PCB manufacturing...
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    Re: Help on PCB design layout

    If you just need to assemble this circuit, you can use a breadboard. It may not look pretty, but it will get the job done. I have done much more complex things on a breadboard - see photo below.
    ...
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    Re: Endmill to cut Gears out of Plywood

    1.5mm x 15mm endmills are not something unusual. You can buy them cheap on eBay/AliExpress.

    Also, as Superman suggested, you could "tweak" the root of the tooth profile to accomodate a slightly...
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    Re: Index pulse on Mach3

    I see. Yes, a 2kHz filter will definitely butcher a pulse from the encoder, even if you extend it to a few milliseconds.
  15. Re: Eighty Three year old needs help in adding Hall effect sensors to DIY machine

    I agree with Mactec. Hall sensors have their place, but this is not it.

    Inductive proximity switches is what you want. They are cheap, rugged, reliable, reasonably accurate, simple to install....
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    Re: Index pulse on Mach3

    The SmoothStepper manual shows a 1.5MHz low pass filter (100 ohms resistor and 1nF capacitor). So that should not be a factor.

    Of course, we don't know if there is any software filtering going on...
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    Re: Index pulse on Mach3

    12ms pulse period (pulse+pause). 6ms pulse length, assuming 50% duty cycle.
  18. Replies
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    Re: Index pulse on Mach3

    I would try extending the pulse further. You can even make it a 50% square wave with a flip-flop (that will divide the frequency by 2, which can be corrected in Mach3's pulley settings).
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    Re: Ac spindle temperature sensor?

    The sensor inside spindles and motors is usually a thermistor. There is no single standard, it could be anything from 1kOhm to 100kOhm. A 100k potentiometer should cover most cases. Adjust it slowly...
  20. Re: My machine is not cutting the distance I tell it to

    10160 steps per inch would be the correct number for 5mm screws.

    200 (steps per turn) * 10 (microstepping) / 5 (mm per turn) * 25.4 (mm per inch) = 10160.
  21. Re: determining Power and ground wires on a linear encoder /scales

    The ground and power wires should have a direct connection to the L393 (=LM393) chip. Check that with an ohmmeter. Pin 4 of the chip is ground, pin 8 is power.

    Normally, wire colors for ground and...
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    Re: Temperature Indicator Wiring

    That means the thermostat has a half-wave rectifier, as opposed to a full-wave bridge. Wrong polarity will not damage it, it just won't turn on (as you have observed). Now take a red marker and draw...
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    Re: Temperature Indicator Wiring

    As Al said, 12V can be connected either way to terminals 3 and 4.

    The relay contacts (terminals 1 and 2) I personally would wire to the safety/E-Stop circuit so the machine would turn off if the...
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    Re: CamBam number format

    Yes. The results are saved as new files ("-Syntec" is added to the original file name). The original files remain intact.



    For now I run it manually after posting a program. There might be a...
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    Re: CamBam number format

    I wrote a Powershell script that converts all numbers for X, Y, Z, A, I, J (but leaves alone F).

    I wonder if there is a way to run the script automatically from the post processor? I think I might...
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    Re: CamBam number format

    Thanks for the offer Kitten, but that would be overkill. I only had 3 programs to make for the Syntec, so I did it in the text editor.

    Still would be nice to find a solution for the post processor...
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    Re: CamBam number format

    Thanks Kitten, but Find/Replace is exactly what I was hoping to avoid.
  28. Replies
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    CamBam number format

    I normally work in millimeters on a Mach3 CNC mill. So my program looks like this:


    G0 X123.456 (rapid move to X=123.456mm)

    Problem is, now I need to generate a program for a Syntec machine...
  29. Re: Help Identifying Components in CNC Control Cabinet

    That's correct. As far as I can see, the transformer is only used to power the stepper drivers.
  30. Re: Help Identifying Components in CNC Control Cabinet

    #1 = VFD. Yes, it only powers the spindle itself.

    #2 = stepper drivers (just drivers, not motion controllers).

    #3 = 24V logic power supply. It powers the contactor (#4), limit switches,...
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