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Type: Posts; User: maxspongebob

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  1. Re: G201X mosfets not making contact with backing plate

    Try using thermal transfer pads.
    ...
  2. Re: Granite Base Moving Gantry - Looking For Feedback

    Here is a screenshot of my Lathe controller cabinet schematic. This is the AC wiring only. Others may do it differently but this works for me without getting too technical. You can use it as a...
  3. Re: Granite Base Moving Gantry - Looking For Feedback

    I was going to send you a photo of the enclosure that I use but then started looking at the size of your servo drives. Then I decided that it wouldn't be useful to compare a random case size to what...
  4. Re: Toroidal PS and E-stop contactor circuit and EdingCNC

    This issue is a prime example of the problem of making Safety "Priority One".

    Mike Rowe, of Dirty Jobs fame, has a saying that addresses this very issue "Safety Third". You can read about it...
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    Re: Check My Wiring Diagram

    BTW, I am just now looking, closely, at your schematic. On the contactor, don't you want to turn it on and off by using one of the outputs from the MB3? Take a look at page 21 of the MB3 manual for...
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    Re: Check My Wiring Diagram

    Here is a quick resource for calculating the diode value. Your power contactor may have a recommended value so start there.

    BTW, I have always heard of it referred to as a Flyback Diode. Anyhow...
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    Re: Check My Wiring Diagram

    My $0.02 for what it is worth.

    Why are you not wiring the stepper enable signals. There is plenty of I/O left over to hook those up. When you press enable on the computer it will lock the...
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    Re: Lathe Conversion, PM1228 to CNC

    I made a depth stop for the spindle. It screws into the spider nut and is secured with the brass knobs.
    ...
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    Re: Help on PCB design layout

    With regard to ExpressPCB.
    I have always found that a good starting point is to see what someone else has done and adapt it from there to meet one's own needs. If you have any interest I will be...
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    Re: Help on PCB design layout

    I second using ExpressPCB. The cost is not all that much for a small board and you get very professional results. Their new software can export a gerber file for use in other applications. Also...
  11. Re: Want to build a cnc lathe. Options for headstock/spindle?

    I think you would be best off starting with a manual lathe frame. I did a conversion of a PM1228, probably bigger than you would need.

    Maybe start with a Harbor Freight Mini Lathe.
    ...
  12. Re: How to combat noises when tracking an encoder output

    You didn't say how many steps/revolution the encoders are or what the number of micro-steps the steppers are using.

    I could see a situation where an encoder could report multiple steps where the...
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    Re: One for the Mach 4 scripting wizards

    Show us a screen capture of your M4 system. Both the mill and lathe screens have a RPM DRO right there. Are you not seeing the indicator or is it showing incorrect data?
  14. Re: Single or separate building circuits for Controller, VFD, PC

    If you are running cable, Run 2 circuits. One 12AWG for a 20 Amp 120VAC and one 10AWG for a 240VAC 30 Amp circuit. You could run the PC and electronics off 120VAC and the VFD off the 240VAC.
  15. Re: Are my Opto switches NPN or PNP? & Do I need anything else to connect them to an

    Just a quick note to demonstrate why one might be better than the other.

    It is always a good idea to configure your circuit such that if the cable breaks or becomes disconnected the limit switch...
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    Re: Lathe Conversion, PM1228 to CNC

    I wanted to turn threads on a gun barrel and needed a spider nut to keep the barrel centered in the spindle. What I made is a new nut for the spindle. Here it is. Some brass screws will finish it...
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    Re: Setting up - Dialing in 3D printer

    Gosh, you have bitten off a lot. New to 3D printing and new build it yourself machine.

    In my experience:
    You should print out a Benchy and post up some high resolution photos of the results. ...
  18. Re: LOOKING FOR BEST WAY TO QUIT JOB OF 1+ MONTH

    Agreed. Honesty. You don't have to give too many details, just the basics. It is the responsibility for a manager/owner of the business to make sure that the loss of one person is not a detriment...
  19. Re: Thinking of doing a lathe build and need some basic questions answered.

    Mach 4 runs on windows which is not a synchronous OS. Windows can't produce the precise time based pulses needed for smooth motion. This is why you need a separate controller to take the movement...
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    Re: Lathe Conversion, PM1228 to CNC

    I made another modification to the lathe. I replaced the discrete interface cards with a universal BOB for the ESS controller. Here is the thread for the new BOB. ...
  21. Re: Thinking of doing a lathe build and need some basic questions answered.

    Since you are talking Mach 4 then you could setup your system with a smart controller like an Ethernet Smooth Stepper. The ESS handles all the motion calculations and Mach just sends it commands. ...
  22. Re: trace out a full sized diagram of a jeep profile

    https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fi.etsystatic.com%2F14637969%2Fr%2Fil%2F1a7899%2F2984371470%2Fil_1140xN.2984371470_bf9v.jpg&f=1&nofb=1&ipt=cff873bffcf3753e75161439ceb4191fce...
  23. Re: trace out a full sized diagram of a jeep profile

    It's a Jeep signature look to have 7 vertical slots for the radiator grill. While your pendant looks really nice a jeeper would know.
    Just sayin.
    ...
  24. Re: trace out a full sized diagram of a jeep profile

    It's not really a Jeep if there isn't 7 slots.
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    Re: Steel G0704 base/y saddle

    For what you are talking about doing the amount of work and cost will probably be greater than a new/used mill and it may also turn out to be a bigger problem. There are many aspects of the G0704...
  26. Re: Controlling acceleration/deceleration throughout parallel facing toolpath

    Do you have the acceleration values setup properly?
    I am pretty sure the head should reach max velocity during the lead in and lead out process. Fusion will always try to keep the chip loading...
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    Re: Cutting Aluminum Sheets.

    You might think about using a different alloy. 3105 has poor machinability qualities. Also, when machining aluminum plate on a router, you need to be careful about your speeds and feeds and ramp...
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    Re: Building the most versitile BOB for ESS

    Final update on the BOB project. I finished the board, software and completed all the testing so not it goes into the lathe. Originally I built my lathe conversion using discrete boards for each...
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    Re: Pull-Up or Pull-Down?

    This is a very good article to explain how pull-ups/down work.

    One must also consider the beginning state of a circuit to determine if the signal should be pulled up or down. Look at a spindle...
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    Re: BLDC Motor needs a new Controller

    I was never able to resolve the issue, except that putting the original controller back in got the RPM that I needed. I did contact Matt at Precision Mathew’s and he did not have any recommendations...
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