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Type: Posts; User: cncuser1

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  1. Replies
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    Re: Newbie problem-wiring in spindle motor

    I don't know enough to answer your question. But until you get a proper answer, go to the manufacturer of each component of your machine and download and save each spec sheet, user manual, etc.
    ...
  2. Re: Help in interpreting results of Rollie's Dad method for aligning spindle on my Mi

    I am not familiar with this method of testing, so I am only interpreting your results.

    It seems to me you have two problems. But first, is the rod only 14mm long, did you make a mistake, is it...
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    Re: PM-30MV with BT30 Spindle?

    sommething looks off there, 220 pounds seems high for that size.
  4. Re: G540 to Consew Type Servo Sewing Machine Motor

    Thanks Ron Thompson.
    Can you give a few words on how it worked or didn't, max cutter size, performance, rpm stability etc?
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    Re: PM-30MV with BT30 Spindle?

    As far as spindle power goes, it depends on what you will be cutting, although more power is always nice, more weight on the head isn't. Especially with your spindle adapter idea.
    Your plan to...
  6. Re: G540 to Consew Type Servo Sewing Machine Motor

    Ron Thompson: could you post a higher resolution file of the schematic ? The version you posted is very hard to read and the Yahoo group has been cancelled.
  7. Re: Chinese high speed spindle for metal milling

    +1 for everything mactec54 said.

    Can you be more specific about what type of metal cutting you want to do, what is the smallest and largest cutters you want to use in steel?

    I was looking for a...
  8. Re: AC sewing motor as spindle.....Any advice?

    This facebook group has a post from a few years ago. The person used something similar on an X2.

    https://www.facebook.com/groups/1523743684592595/?ref=group_header

    The date of thier post was...
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    Re: Screw options for small knee mill

    I was questioning about all 3 axis.....Are ballscrews advantageous for light, small, manual milling? In what way?
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    Screw options for small knee mill

    I have an old knee mill, made from castings.
    It is table top, so about half or 2/3 the size of the commonly known Sieg X2.

    It will be used for manual milling only, no CNC.
    It is fairly accurate...
  11. Re: AC sewing motor as spindle.....Any advice?

    What type and size of machine will the motor go on?
    What is the power you expect to need( HP or Watts of the motor) ?
  12. Replies
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    Re: milling part off in Z

    First thing is to see if the manufacturer has instructions for setup and calibration.
    Second is support services from the manufacturer.

    Machining in rotary axis is very suseptible to errors, so...
  13. Re: started my cnc conversion for Precision Matthews PM-25MV Mill

    I suggest to not machine parts untill you have the purchased components in your hands and verify dimensions first.
    Especiallly if you buy cheap chinese components, dimensions might be out of...
  14. Replies
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    Re: Horrible Surface Finish

    You have a tapered gib that doesn't make full contact along it's entire length?
    Can you use the DTI near the gap to correlate the gap to the deflection?

    In any event the gib needs to make full...
  15. Replies
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    Re: Horrible Surface Finish

    Your mill is easily capable of better than .005" which is likely a main source of the problem. I suggest continuing with the DTI across multiple locations to hunt down the exact source of the .005".
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    Re: a couple of queries

    If i can give one more opinion, as you seem new to cnc conversion, if your goal is to get to making parts soonish, try not to re-invent the wheel. I suspect that there is a lot of info for the taig,...
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    Re: Horrible Surface Finish

    So If I understand correctly:
    - Before you started adjusting the gib you had .010" play in the head along the Z axis. Was this strictly parallel to the axis of the column? Then this is backlash, it...
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    Re: a couple of queries

    Regarding question 1: the software can accommodate any thread pitch as long as it is precisely known. If the pitch is appropriate is another question. 6G, that looks like a tolerance spec. So when...
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    Re: Horrible Surface Finish

    OK, so you have a quill. The quill is locked down good and tight at all times , right?
    There is lots of opportunity for problems between the cutter tip ...through the head...to the column.

    Just...
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    Re: Horrible Surface Finish

    I'm no G code expert but I don't see a problem with your code. Arcs are programmed as arcs, not as a series of small straight lines.

    In my opinion it is not a software issue.

    You've done...
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    Re: Horrible Surface Finish

    Good suggestion.
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    Re: Horrible Surface Finish

    Can you redo your test with a shallower depth of cut? keep EVERYTHING elese the same?
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    Re: Horrible Surface Finish

    "The surface finish is uniformly bad on circles and arcs." if this means that the phenomena is the same around the whole 360 degrees of a circle then to my mind this is a software issue.

    I...
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    Re: Horrible Surface Finish

    From the info you provided it seems that you have identified he two most probable sources, machine loosesness or software.

    I would look into the software setting for how small the linear segments...
  25. Re: Spindle Regrinding Service for Benchtop Machines

    Vmax, do you have an example to show?
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