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  • PhilB's Avatar
    10-23-2020, 07:53 PM
    PhilB replied to a thread Teensy MicroMod in General Discussion
    Interesting to say the least. I wonder how ethernet would be handled. Hypothetically, of course.
    11 replies | 426 view(s)
  • PhilB's Avatar
    10-22-2020, 03:55 PM
    You have a pretty steep learning curve ahead. I suggest you start with something a lot simpler than a BGA package. Assuming you want to do surface mount, you could look at doing SOIC packages, 805 Rs and Cs. The Atmel...
    5 replies | 202 view(s)
  • PhilB's Avatar
    10-17-2020, 04:43 PM
    In that case, a simple plug-in to read the voltage could be written. My breakout board has a serial port header on it so you could use that to get the tip voltage. Sounds pretty easy at first blush.
    6 replies | 375 view(s)
  • PhilB's Avatar
    10-17-2020, 03:23 PM
    A THC is in the development stages. Terje, the grblHAL developer is looking at it right now. The T4.1 has more than enough spare cycles. I'm pretty sure he would love to work with you on it. I have an ADC card in...
    6 replies | 375 view(s)
  • PhilB's Avatar
    10-17-2020, 12:46 AM
    It can use the sd card on the teensy. The best way to use it is to put the card in the teensy and leave it. If you put the machine on the network via ethernet, you can download your GCode to it and run it from there. ...
    6 replies | 375 view(s)
  • PhilB's Avatar
    10-15-2020, 10:09 PM
    I've posted about my Teensy 4.1 Breakout Board for grblHAL previously. There was some interest in seeing actual machines built with it. So,... Here is a show case of grblHAL based CNC machines with lots of details on...
    6 replies | 375 view(s)
  • PhilB's Avatar
    10-12-2020, 04:22 PM
    Yes, that doesn't need a beefy driver at all. But, I would suggest you look at the TMC step sticks. They are head and shoulders above the others. I was using a 4988 in an astro tracker I made. While it worked fine,...
    5 replies | 223 view(s)
  • PhilB's Avatar
    10-01-2020, 02:46 AM
    Yeah, all those can add up. I've seen it all except for returns. Haven't had one yet though I expect it to happen. I do a visual inspection on everything I ship so at least obvious stuff gets caught. And, I use my...
    20 replies | 551 view(s)
  • PhilB's Avatar
    09-30-2020, 06:07 PM
    Thanks. I'll look at the 2113. My Chinese assembler has them in stock so it would be easy. $10 may be a reasonable price for 1 but you should factor in your time to package and ship. Consider your net per...
    20 replies | 551 view(s)
  • PhilB's Avatar
    09-30-2020, 02:25 PM
    On your original question - is there a market for these? Definitely. You've done a lot of the hard work (including documentation!) so might as well harvest a little reward for it. Tindie is an easy way to do this...
    20 replies | 551 view(s)
  • PhilB's Avatar
    09-30-2020, 01:55 PM
    This looks well thought out. Good job. What power multiplexer are you using? I've been looking at the TPS2114/5 for a project I'm doing and have exactly the same problem of the bidirectional power pin. I thought...
    20 replies | 551 view(s)
  • PhilB's Avatar
    09-28-2020, 10:58 PM
    I'm hoping that the UGC and bCNC folks get grblHAL religion. It is capable of taking significant share from both grbl "classic" and LinuxCNC. But, to be honest, java based GCode Senders have their limitations. It...
    30 replies | 2139 view(s)
  • PhilB's Avatar
    09-28-2020, 07:48 PM
    Hi John. Have you tried grblHAL with compatibility settings? It takes a recompile though I have prebuilt 3, 4 and 5 axis versions on the github page. Or, you can build it yourself from the grblHAL github site. Follow...
    30 replies | 2139 view(s)
  • PhilB's Avatar
    09-24-2020, 03:15 PM
    Are you saying they took your exact layout and used that to build their product line? Then you may have a copyright claim against them. If you are saying they liked your idea and built a product that is very similar...
    16 replies | 424 view(s)
  • PhilB's Avatar
    09-24-2020, 02:11 PM
    There's a fine line here. Some companies do have an excessive markup on generic stuff but this race to the bottom (line) causes some real problems for electronic products. The whole "Blue Pill" for $2 thing has lead to...
    16 replies | 424 view(s)
  • PhilB's Avatar
    09-21-2020, 11:11 AM
    Some cheap servos are pretty "spikey" and can cause glitches on the power rail. Motors and digital logic don't exactly go together well. I usually try to power them from a separate source. The logic circuits in...
    16 replies | 424 view(s)
  • PhilB's Avatar
    09-08-2020, 11:33 PM
    I haven't looked this up but what is the max recommended impedance of the iMXRT1062's ADC? Good to keep the voltage divider below that. If you need a divider that goes above the max, you can use an opamp as a...
    9 replies | 482 view(s)
  • PhilB's Avatar
    09-08-2020, 09:58 PM
    vj answered the MAC question. I can confirm each one is unique (or at least the 4 I have are). To the IP addr question, if you select DHCP, you get unique IP addrs. (I think that's the default...) You can also...
    3 replies | 208 view(s)
  • PhilB's Avatar
    09-05-2020, 02:34 PM
    Yeah, the RAMPS board was never intended to drive so many steppers and, frankly, is fairly underspec'd for the total amount of power it could draw. The saving grace there is that 3D printers are not terribly demanding....
    8 replies | 387 view(s)
  • PhilB's Avatar
    09-04-2020, 11:59 AM
    Thought I posted this but it seemed disappear. The photo is pretty blurry but it looks correct. 10 mm wide. You would run a bare wire right on top of the trace and solder it at each pad where there is significant...
    8 replies | 387 view(s)
  • PhilB's Avatar
    09-03-2020, 03:32 PM
    OK, sounds good. Sizing the traces is easy - there are on online calculators for trace width based on copper thickness and current. You don't want more than a 10C temperature rise. Note that you will never get both...
    8 replies | 387 view(s)
  • PhilB's Avatar
    09-03-2020, 03:07 PM
    Hard to say without a schematic. I would regulate to 5V for the T4.0. You don't want your 5V fighting Vusb so yes, isolate. Especially if it might be 6V... How are you interfacing to the step sticks? and are you...
    8 replies | 387 view(s)
  • PhilB's Avatar
    09-02-2020, 08:19 PM
    Yes the German CNC stuff is topnotch! Uber Alles! I'm in the US though about 1/3 of my customers are in Germany. grblHAL is definitely "not your father's GRBL". The author, Terje Io, has done an outstanding job of...
    30 replies | 2139 view(s)
  • PhilB's Avatar
    09-02-2020, 07:40 PM
    Lol. There are a number of DM556 clones out there. In fact, I would be surprised if you can actually buy a real one. As soon as there is any product that sells well, the counterfeits are not far behind. They don't care...
    30 replies | 2139 view(s)
  • PhilB's Avatar
    09-02-2020, 06:00 PM
    Yes, please post your progress and feel free to contact me directly if you have any questions.
    30 replies | 2139 view(s)
  • PhilB's Avatar
    09-02-2020, 04:34 PM
    Since you have the stepper motors picked out, you should size the drivers to them. But before that, you should probably decide on what voltage you want to run them at. I'd be temped to go to 48V so need to get drivers...
    30 replies | 2139 view(s)
  • PhilB's Avatar
    08-27-2020, 12:56 AM
    My application of the Teensy 4.1 has to interface with a lot of 5V stuff. Generally, I look at each I/O and decide how I want to make it work. In the case of outputs, I really like T logic (as in AHCT or HCT). Wish...
    4 replies | 369 view(s)
  • PhilB's Avatar
    08-27-2020, 12:42 AM
    I like this idea. In the space of the SD card, you could add 25 more pins at a 100 mil spacing. Not saying that's how it should be done but I could see at least 15 more pins. I could certainly make use of them for...
    235 replies | 26971 view(s)
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