584,826 active members*
5,275 visitors online*
Register for free
Login

Search:

Type: Posts; User: TomB

Page 1 of 6 1 2 3 4

Search: Search took 0.00 seconds.

  1. Replies
    8
    Views
    1,862

    Re: How capable are these machines?

    I think the answers to this question should be split into 2 sequences; Is it a problem sharing the table between turning and milling? Is the machine solid enough for turning and milling? Answer...
  2. Replies
    0
    Views
    1,045

    Need footprint size

    After 5 years I'm about to move my machine from NY to VT. I'm in the process of making room for it in the new shop. Can anyone provide the length and width of the table that came with it (i.e. the...
  3. Replies
    6
    Views
    1,936

    Re: Mechanical Design & Engineering

    I don't really know what a "mechanical mind" is but I fully agree it is a requirement for a successful ME career. It is not something that is imparted by engineering schools. If you have it when...
  4. Re: how would you make a three point swivel? (and just what is that?)

    At first I did not think it was possible but then it occurred to me that juggler can keep 3 or more things in the air so why can’t that be the model to follow. Since this is I think ‘inventing’ we...
  5. Thread: Shopmaster height

    by TomB
    Replies
    4
    Views
    1,501

    Re: Shopmaster height

    I don't have the measurements for my cellar ceiling but I found that I had to leave the top hinged up cover off. It never made any noticeable difference.
  6. Re: ENGRAVING FROM SCANNED PICTURE WITH MILL TURN

    Does anybody know why the posted videos show only the left side of image? When the lead image is shown the text for the first line is "NOTICE THE TEMPO", the second line is "COVERS OVER THE W" but...
  7. Re: Flatbed Cutter - Tangential, Oscillating Knife, Creasing

    Interesting project. I'd consider cable driving a machine lit this. Imagine the gantry setting on and locked onto the lower rail. Then run a chin cable from it, around a sheave at one end then...
  8. Replies
    4
    Views
    745

    Re: High speed, low force, quiet application

    I use to spec machines for a living. One of the hardest parts of the job was getting the users to stop thinking about the machine they imaged and start thinking about what they needed done. In this...
  9. Replies
    2
    Views
    647

    Re: Calculating torque for a stepper.

    I don't know much about the performance curves for steppers. But from basics the largest torque is required when spool is full i.e. T= 32# x 1" = 2.666 f#. hp=(2Pi) w T / 33000 where w is rotation...
  10. Re: Straitness, flatness and squareness of a gantry type CNC

    The first step is establishing a reference surface. If I was going to attack this I would start by getting a 3' x 2' granite block. I'm not to far from Grizzly so one of those would sufice and they...
  11. Re: Straitness, flatness and squareness of a gantry type CNC

    Can you give us an approximate dimension of length or width just so we can have some hint as to what plans might be feasible. Typically alignment efforts require some reference plane and what would...
  12. Re: Still looking for a mechanical axis drive system

    As I got reading what I wrote I realized I had not addressed gantry stiffness in the x direction. Add some diagonals from the end of the gantry to a point 1' away from the gantry in the x direction...
  13. Re: Still looking for a mechanical axis drive system

    Just because you have been looking for an answer for a while and I enjoy inventing hypothetical machines that I’ll never have to build and debug I’ll offer a response. First you do not specify how...
  14. Replies
    11
    Views
    1,286

    Re: Hi everybody this is my project.

    I mostly agree with Gerry's critique, except you still have to consider weight. Nobody can sidestep F=ma. The weight of a gantry can put significant dynamic load on the steppers and the base guide...
  15. Replies
    75
    Views
    13,918

    Re: Issues with Shopmaster owners

    I was pleased to see JT get his position out on one of these squabbles and even more pleased to see Smallblock notice the points that fully justified JT’s position. I have a TriPower that is...
  16. Replies
    4
    Views
    1,697

    Re: A Remedy for table twist

    I'd also like to see a bit more discussion on this thread. I like the way Wormwood attacked the problem, but I'm fascinated by the results Bill got. I'd very much like to do a scraping seminar but...
  17. Replies
    2
    Views
    689

    Re: Longest possible drillable hole

    I think you would find that earth drilling bits are something different. I seem to remember them as having 3 cutting gear-like teeth spaced 120* apart where each cutter can be rotated at different...
  18. Re: any standard design to attach end of a tube to a plate & allow tube rotation?

    There are a number of standard approachs depending upon more detailed requirements. If the tube could go through the plate and something else was holding the tube square then drill a hole and put a...
  19. Replies
    9
    Views
    1,102

    Other than some small research companies that are...

    Other than some small research companies that are converting water and carbon monoxide into ethanol intended for plastic manufacture I've never seen any company destroy water. (Remember that even...
  20. Its been too long since I used bearing load...

    Its been too long since I used bearing load tables so I don't remember the details. But I did a search for Timken.com then selected Tapered Bearings. Did a second search for 32217 bearing and ended...
  21. Replies
    1
    Views
    4,738

    Your query may not be getting responses because...

    Your query may not be getting responses because it seems to mix topics. I’m not expert or even marginally knowledgeable but some ancient engineering courses may help to clarify the question.
    1) You...
  22. Replies
    9,196
    Views
    334,009

    Having been a PI for years during my career (but...

    Having been a PI for years during my career (but its not nearly so personally profitable when you work for industry), I understand what you said and agree that you presented a correct short term...
  23. Replies
    9,196
    Views
    334,009

    I was not saying the article had been posted...

    I was not saying the article had been posted previously. I assumed it was a new article. I was commenting that using other source material some of our contributors (I think it was fissist but there...
  24. Replies
    9,196
    Views
    334,009

    This is the same finding we showed in this thread...

    This is the same finding we showed in this thread several hundred posts back. Using the ice core data it was clear that the earth went through 150 to 250 year warm periods about every 1000 years...
  25. Replies
    6
    Views
    860

    That just what I needed. Thank you, Louie

    That just what I needed. Thank you, Louie
  26. Replies
    6
    Views
    860

    Just got back from a trip and checked for...

    Just got back from a trip and checked for replies. What do you mean by an 'encoder'. It sounds like what I would need but I did a search at Enco and it led to calipers.

    Tom
  27. Replies
    6
    Views
    860

    Need Angular Measurement SEnsor

    Is there a 'glass scale transducer' equivalent for rotary motion. I'm thinking of building something and it will require measurement of the angle between arms. I'd like something that produced an...
  28. Replies
    3
    Views
    1,805

    When I first got my machine I had problems with...

    When I first got my machine I had problems with the gib adjustment. Set them too tight and the table travel would bind. Just a bit loose and the table could be rocked. In the loose case I got a...
  29. Replies
    24
    Views
    6,389

    I'm obviously not explaining myself clearly. (I...

    I'm obviously not explaining myself clearly. (I wish I knew how to add a sketch to this note.) I was not suggesting anything that stood up like the current support post. I was imagining hooking...
  30. Replies
    24
    Views
    6,389

    Why not pull the panel up?

    I'd mount the panel frame to a pivot rod and have a 6" long bar sticking down and out front when the panel was down. With a small electric motor connected to the back support and piece of allthread...
Results 1 to 30 of 168
Page 1 of 6 1 2 3 4