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Type: Posts; User: cgo

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  1. Replies
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    Re: Spindle drive: potentiometer replacement

    I used a 10 turn potentiometer 2k ohm to set the output voltage on my machine.
    464201

    This worked for my machine because both the VFD and BoB have isolated power supplies, both grounds are...
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    Re: Windows 7 Laptop on an old Network

    It will work , if you can see all the older pc's in the network already but the 7 machine cant ?
    Try rebooting some or all the pc's after there all connected.

    If win7 still isnt showing up or...
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    Re: PM-25MV full review w/pics

    I feel the same way about this machine, currently machining out a cnc conversion for mine.

    Had the hit the spindle wrench with a hammer a few times to reduce the play, will probably use a 1/4"...
  4. Re: Any one running LinuxCNC with the Mesa 5i25 on their Patriot

    I am not running the same machine but I do use Linuxcnc.
    Linuxcnc runs in realtime on a PC unlike windows and mach3, you can download and use the setup cd or a memory card to run Linuxcnc without...
  5. Thread: PM-25MV

    by cgo
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    2,489

    Re: PM-25MV

    I have one, although I am blueprinting the machine for cnc.

    Did use it a couple times so far manual but trying not to get it dirty until Im finished blueprinting.
    The spindle motor runs very...
  6. Re: motors turn on but will not move, wiring diagram incorrect?

    Heres a few things you can try, maybe one or all may end up being needed, try them separately.

    Most breakout boards have LEDs on the outputs for each drive signal, if there not lighting up then...
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    Re: Power Required for new building

    Power Calculator for Generators: Convert kVA to kW, kW to kVA, kW to HP

    This link has just what you need to figure out your needed power.

    Yes 800 amp per leg for 800 amp 3 phase service.
    ...
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    Re: New to CNC machining and this site

    Since you say your new to cnc machining, I would say, stay away from anything more than about five years old, you will not be ready for all the pitfalls of older machines.
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    Re: Slave axis motor turning slower only sometimes.

    What are the settings you have for,

    ports and pins: kernal speed
    motor tuning: step pulse
    motor tuning: dir pulse
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    Re: Slave axis motor turning slower only sometimes.

    It may not be running slower, if the machine is not binding up then it could be missing steps.
    If you still need help, then describe the pc and software your using.
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    Re: step per unit ???? how hard can be ?

    I forgot to ask is the steppers installed on the machine?
    Did you measure the distance that it moved or just looking at mach readings ?

    If you are bench testing it, try this, using a marker or...
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    Re: step per unit ???? how hard can be ?

    I see what you are saying, the g203v that come direct from gecko are set at 10u, there is a note of internal jumpers that are not for users but could be used to make the g203v compatible with...
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    Re: step per unit ???? how hard can be ?

    If the stepper motor is 200 steps per 360 degrees (most are) 1.8 degree per step then.

    Motor steps x microsteps per step = steps per rotation, so if you input what you said you are using, it is (...
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    Re: Epic CRP4848 Build Thread!

    Not defending them at all, but it was probably cut on a cnc cold saw which is the fastest way to cut that material, you will probably not see the finish after its built and if the saw if setup right...
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    Re: How to Speed Up my G00 rapid moves?

    f60
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    818

    Re: Ideas on upgrading my mill to be more rigid

    Maybe with some creative steps you can do everything with that machine you want. What I am talking about is the methods you use to cut different materials and within the limits of your machine.
    This...
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    Re: Ideas on upgrading my mill to be more rigid

    Yes, that is where the rails would go.

    The red arrows you would remove ( current linear bearings )
    The blue arrow is the part that will need machined or replaced so that 4x new linear bearings...
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    Re: Ideas on upgrading my mill to be more rigid

    You would need to have/or machine the blocks that are on the machine now (the part with the switches on it) or make a new one.
    Looks like theres enough material to machine pockets out for the new...
  19. Re: Newbie, Chinese laser cutter head moving wrong way on x-axis

    First identify the problem axis. (sounds like Y but could also be X)
    There should be a setting in the software to change the direction, if not and it uses stepper motors you could reverse the wiring...
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    Re: Ideas on upgrading my mill to be more rigid

    I agree supported rail could help.

    Heres one type of supported rail I found on ebay, you will probably find out you need to replace x,y and z if there all unsupported.

    Linear Bearing Slide...
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    Re: trouble making motors move in emc2

    Was thinking you had something to setup mach after I typed that, all those setting could take a long time to figure out.

    There is a few settings in linuxcnc you will have to edit manually, the one...
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    Re: trouble making motors move in emc2

    Maybe a picture and part number of the break out board would help.

    Not sure how it worked in mach. Ive circled settings that dont look right.
    You have 1 for this output pin but its probably 6...
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    Re: trouble making motors move in emc2

    Theres a few settings in linuxcnc you will have to manually change, maybe that is why its not running.

    First what is the parts you are using and will probably need either screen shots or settings...
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    Re: Wiring mach3 breakout Board BL-Mach-v1.1 D402

    A = step 8 | A= dir 9
    B= enabled | B step 16 | B dir 17 | step port 1 | dir port 1

    Ports and pins, page 3, picture 2 on the pdf , although they show B disabled in there picture since its not used...
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    Re: All stepper drivers died at once.

    That was regarding 3 phase hybrid steppers and drives.
    Even looking at my regular steppers with an amp probe just now they also draw more running than holding, and even more power switching...
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    Re: All stepper drivers died at once.

    Heres the 105c caps in stock value and a little higher capacitance.
    LNT1K153MSE Nichicon | 493-8970-ND | DigiKey

    LNT1K223MSE Nichicon | 493-8971-ND | DigiKey

    If you have to get new drives , I...
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    Re: All stepper drivers died at once.

    Different brand too, new unused caps can go bad sitting on the self btw.
    Its rating is at what you said your reading was, from my experience a voltmeter may read a little high when a power supply...
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    Re: All stepper drivers died at once.

    The drivers typically go shorted when they go, internally they may have a fuse/fusable link but it should be last to go.
    Maybe time to remove a cover and inspect one, ripple could cause heating and...
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    Re: All stepper drivers died at once.

    Besides losing a connection inside the driver itself , which would require you to remove the cover and inspect the boards for bad solder connections or a fusable link.

    The only other thing I...
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    Re: All stepper drivers died at once.

    I would suspect the board with all the fuses has a problem, cant see all the drives going bad at the same time. This is your common connection between all the drivers.
    Plus each driver is fused from...
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