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Thread: LVL or Steel base??

  1. #141
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    Default Re: LVL or Steel base??

    Active Low is set. I did some meter reading before work this morning and determined that I was doing something wrong last night.

    When the sensor is not triggered, I read 0vdc which is correct. However, when the sensor is triggered, I'm ready -.5vdc. That doesn't seem correct.

    Right now I'm just working with the Y axis. Both sensors are wired together, so I'm going to separate them and see what they read when triggered individually. That may point to some kind of wiring problem.



  2. #142
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    Default Re: LVL or Steel base??

    Instead of rushing around trying to take measurements... I took my time with the mult-meter.

    Sensor off, +23vdc. Sensor triggered, +1vdc. These readings were taken at the G540. So the sensors are doing their thing, however, Mach 3 doesn't see it. I've tried different input pins without any success. Active Low is checked, debounce is set at 0.

    Is there some other setting I'm missing???

    Last edited by bobmagnuson; 09-18-2014 at 05:37 PM.


  3. #143
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    Default Re: LVL or Steel base??

    Wow! I see you've posted a bunch! Interesting that I haven't gotten any notification.

    You should not be seeing 1V when the sensor is ON. Do a search on what the TTL logic voltage should be. I think it should be 0.8V or less for a switch to be considered OFF.

    Try using a 12V power supply instead of 24V.

    Also, short the G540 limit switch and see if Mach sees that.



  4. #144
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    Default Re: LVL or Steel base??

    Just did a quick check on the Mach3 manual. Your voltage should be between 0V and 0.8V. See section 4.2 of the Mach3 manual.



  5. #145
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    Default Re: LVL or Steel base??

    Thanks Joe. After some messing around with wiring on Saturday, I got it working.

    Nothing too major, just a crossed wire. But frustrating none the less.

    Waiting on a couple parts and I can get the homing/limits wrapped up. Dust shoe brush material should be here today and the duct work order should be ready later this week.

    Getting closer to really using the machine.



  6. #146
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    Default Re: LVL or Steel base??

    I'm thinking ahead to a vacuum hold down system. Would something like this work for a 4x8 vacuum hold down area???

    http://www.americas.fujielectric.com...iles/VFC70.pdf

    Specifically the VFC700A-7W model.



  7. #147
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    Default Re: LVL or Steel base??

    I think that may be on the small side.
    96" H2O = 7" Hg. That's not a whole lot.
    For comparison, Shopbot sells a similar model, but it's 16.9HP, and pulls 13"Hg.
    Bottom line, a 4x8 vacuum table is not cheap.

    Cheapest option is 3 or 4 vacuum cleaner motors, which can get you 9-10"Hg, and 200-300CFM. Downside is that they are loud, and generate a lot of heat.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  8. #148
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    Default Re: LVL or Steel base??

    Thanks Gerry! I was originally planning on the vac motors, but thought this might work. Any idea how loud this would be in comparison to the vac motors? What about two of these regen blowers, wired and zoned like people do with the vac motors?



  9. #149
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    Default Re: LVL or Steel base??

    I don't have any experience with either type. I've only used becker rotary vane pumps, which can pull high vacuum and high cfm.

    Do you have 3 phase power available?

    Running two of those in parallel will double the cfm, but the vacuum stays the same. I don't know if you could run them in series.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  10. #150
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    Default Re: LVL or Steel base??

    I've got a Kay Phasemaster which should be able to start it. Looks like I might just do the vac motors. There is no way it'd be able to run a large enough pump like the Becker. Plus the cost is nasty. :-)



  11. #151
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    Default Re: LVL or Steel base??

    I've got a question regarding limit switches. I've got the machine homing, etc. Pretty awesome to watch it always come back to the same location.

    When I'm jogging the machine and it hits a limit switch it stops, just like it's supposed to. And Mach 3 goes into e-stop.

    I can't clear it with a reset, nor can I jog.

    How do I get it out of that e-stop?



  12. #152
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    Default Re: LVL or Steel base??

    On the limits tab, select either manual override or auto override.
    With auto, you can jog off a limit anytime you hit one.
    With Manual, you have to re-enable it each time you hit a limit.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  13. #153
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    Default Re: LVL or Steel base??

    Awesome, thank you. I don't suppose it prevents me from doing something stupid like jogging past the limit?



  14. #154
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    Default Re: LVL or Steel base??

    No, it doesn't.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  15. #155
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    Default Re: Wise Choice.

    HELP!!!! Mach 3 has flaked out on me!!! I loaded a set of g-code to surface the table and it's completely messed up. I ran the built in pocket wizard and instead of generating the g-code for a pocket, I've got some zig-zag line.

    Also a problem with manual g-code entry. As an example, g0x05 will move to x05. However, G0x00 doesn't do anything. Same holds true to Y and Z.

    Not sure what I screwed up, but I did a good job. I did try re-installing ( I didn't uninstall first), but that didn't help.

    LVL or Steel base??-20141009_203433-custom-jpg



  16. #156
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    Default Re: LVL or Steel base??

    In MDI, type G90, and see if that fixes your issue. I think you're in Incremental mode (G91).

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  17. #157
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    Default Re: Wise Choice.

    Well, I figured out what the problem was about 2 minutes after I posted the above. I had the Distance Mode set to 'Inc' instead of 'Absolute'.

    Problem fixed!

    - - - Updated - - -

    Gerry, you hit it right on the head!!! Thanks for offering the help!



  18. #158
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    Default Re: LVL or Steel base??

    Looking at spindles for a future upgrade... I've got 3 phase power via a Kay Phasemaster. Using a vfd, can I run a 380v spindle??? Or am I limited to 240v?



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    Default Re: LVL or Steel base??

    Quote Originally Posted by bobmagnuson View Post
    Looking at spindles for a future upgrade... I've got 3 phase power via a Kay Phasemaster. Using a vfd, can I run a 380v spindle??? Or am I limited to 240v?
    The drive you use for the spindle will have its voltage rating. You would buy a drive suitable for the power you have. That being said realize that many VFD can ripen just fine off of a single phase supply. So you need to consider is using the phase converter worth it for this job.



  20. #160
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    Default Re: LVL or Steel base??

    My dust collection is 3 phase so the converter is already on. Plus using single phase supply, the vfd has to be over sized.

    I need to find a reasonably priced 220v spindle. And certainly not the Chinese crap on ebay.



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