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Type: Posts; User: cncuser1

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  1. Replies
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    Re: Opinons on Masso controllers?

    Thank you for taking the trouble to reply.
    I am looking at a machine that comes with a Masso included. I am familiar with the machine but not Masso.

    So now I feel they are not a gamble from the...
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    Opinons on Masso controllers?

    What do people think of the Masso controllers.?
    Are they reliable for basic 2.5D and 3D milling work ?
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    Re: Suggestion on STEEL capable Benchtop CNC

    Can you give numbers for the accuracy and size of work you intend to do?
    Will it be made from flat sheets or blocks of raw material?
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    Poll: Re: Precision Milling machine

    I agree that the machines you are asking about will not consistently meet your requirements for every dimension.

    But looking at what you intend to make I would not agree that every dimension needs...
  5. Re: Anyone tried these cheap eBay 5-axis trunnions with harmonic drives?

    How will you do the post processing?

    You will have to take great, very extreme care in setting it up. The alignment of ALL the axis of the trunnion to the rest of the machine will have to be...
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    Re: Idea for "beefing" up the old x2

    The weakest part of these mills is the connection of the column to the base. If you are not fixing that you are not fixing the problem.
    The next worse part is the machining tolerances of the...
  7. Re: Anyone tried these cheap eBay 5-axis trunnions with harmonic drives?

    If it on eBay then it is probably on Aliexpress. You might find other sellers there willing to give more information.

    The thickness of the side wall where the connector is located tells me the...
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    Re: Small yet Robust machine recommendations.

    Join some groups dedicated to specific machines to see if they can do what you want.
  9. Re: Vertical pattern when turning on CNC converted mini lathe.. can anyone help?

    This is not abnormal, especially in lower end machines.

    Suggestions to look at:
    - the balls crews should have proper angular contact bearings on one end. Make sure they are properly preloaded....
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    Re: Small yet Robust machine recommendations.

    In the class of hobbyist/enthusiast , the short answer is, without seeing drawings, the Sherlines are surprisingly able. The next small step up in quality and rigidity is Taig. For their size and...
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    Re: need to buy mill & biiiig help

    For manual milling, all elements are matched for size if for hobby use. The elements are machine size, spindle and cutter. So generally a BF45 will not be used with small cutters because even if the...
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    Overall status of Mach4?

    I'm tying to evaluate the status of Mach4.

    Overall is it being actively supported by the developers? Such as bugfixes and releases?
    ( I looked on their website and couldn't find information...
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    Re: Need help - dovetail/gib oiling

    DLF: could you post some part numbers for the hardware?
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    Re: Upgrade driver or stepper?

    All sorts of professional machines use steel gibs, not bronze. Make sure the gibs fit properly. make sure the screws that are against the gib don't tilt or push it in the wrong orientation.
  15. Re: Tram vs Square - what's more important? No adjustments on head.

    You want the 3 axis mutually perpendicular, do this first.

    If the axis of the spindle is not parallel to the axis of the X axis, first make sure the gib of the head is properly fitted and...
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    Re: Think something went wrong with my ballscrew

    atomarc: I'm looking to reball one or two cheap Chinese ballscrews and looking at the prices I saw ( @$0.25 or $0.5 each) for my quantities it didn't make sense.
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    Re: Silly 4th Axis Question

    Do these units have bearings or bushings in the spindle? I'd prefer bearings if I knew my work had a lot of small back and forth movements.

    The size of stock or workpiece would make me prefer a...
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    Re: Think something went wrong with my ballscrew

    atomarc: have you chosen balls from bal-tec that are within the price range of hobbyists? I have looked at their prices and they seem to be for high end, professional rebuilds.
    If you have, can you...
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    Re: Silly 4th Axis Question

    If you do direct drive then the holding torque on the stepper would limit the type of work you can do. The gearboxes multiply the holding torque so you can do machining away from the axis of rotation...
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    Re: Think something went wrong with my ballscrew

    Chances are that event that damaged the balls also damaged the nut. Did you examine the screw closely, with magnification?
  21. Re: Speeds, Feeds, and Strategies for Bench Top Mills

    CL: Scraping the ways can remove uneven tightness in the travel.
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    Re: rf31 benchtop Help Needed

    Agreed: The question is pretty broad.
    Are you asking about pinouts, wire gauges, wire styles ( ribbon or shielded)?
    Connectors?

    It may also be important whay BOB and Controller you have and the...
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    Re: Upgrade driver or stepper?

    I think this is some sort of progress.
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    Re: DIY Preload on a ballscrew

    Mikeedd: can you post a link to the provider of the oversize balls you purchased? And if possible how you did the process?
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    Re: Upgrade driver or stepper?

    tjbaudio: Mount the pulley on the stepper and put an indicator where the belt contacts and also on an upper or lower face. Measure the runout at those two locations and re-evaluate if the belt can...
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    Re: Upgrade driver or stepper?

    tjbaudio: when turning the ballnut by hand you had a strange friction, take a look at the ball screw it may be bent or maybe the bearings in your mounting may have problems. When you remount the new...
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    Re: Upgrade driver or stepper?

    If you do really have that much friction then you probably want to eliminate it, not design around it.
    If you do really have that much friction then there will be too much wear related to the...
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    Re: Upgrade driver or stepper?

    tjbaudio: That ball screw has the specs I was referring to ( .2" pitch, one lead) . One part of the description says machined ends, another part says not machined, so you'll want to clear that up...
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    Re: Upgrade driver or stepper?

    300lb of friction does seem like alot. These mills have many sources of problems, this might be one. First off I'd ask if the ways get hot? That much friction in a peck drill operation must generate...
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    Re: Upgrade driver or stepper?

    tbaudio: .5" lead and 2 starts... that is the ssource of the problem with lack of ooomph in Z. Any decent ball screw with .2" lead, 1 start! will give you everything you need in Z ( force and...
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