tomking505

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  • December 12, 2013 at 5:27 pm in reply to: slow in the corners #5050
    tomking505
    Member

    How does the Ulitmaker demo manage it??

    Not arguing with you, just trying to understand this.

    Thanks!

    Tom

    December 12, 2013 at 3:43 am in reply to: slow in the corners #5046
    tomking505
    Member

    Thanks, Alden. I cranked up the junction deviations to 0.05, but it didn’t seem to make much difference. Even 0.5 seemed the same.

    I checked and the files that CamBam made have G64, not G61.

    No problem. I just wanted to be sure I didn’t goof something up.

    Tom

    November 25, 2013 at 3:02 am in reply to: 32x Slow Mo Motor Movement #4973
    tomking505
    Member

    The spastic motor problem isn’t the motor. I see it happen on other motors.

    This only happens as it begins to turn, or as it slows to a stop.

    The motor actually rotates in the opposite direction for a tiny instant.

    .

    November 25, 2013 at 2:56 am in reply to: TinyG with parallel port based stepper motors. #4972
    tomking505
    Member

    What kind of drivers do you have?

    November 14, 2013 at 10:14 pm in reply to: TinyG with parallel port based stepper motors. #4949
    tomking505
    Member

    I did pretty much what you seem to want. My CNC machine had a parallel port driver board. I disconnected the motors from that, and connected to the TinyG.

    However, TinyG does not support 48 volts. Mine ran at 36 volts, but no go. The driver chips on the TinyG can only handle 30 volts max. In my case, I had to replace the power supply, about $40.

    (But believe me, I am thrilled to be able to connect my CNC to my laptop. I do not keep a desktop unit connected anymore. To use my CNC, I would have to find a monitor, find a keyboard, etc. Now, anytime I want to run my CNC, my laptop handles it.)

    If you want to run 48 volts with the TinyG, you would have to connect external 48 volt motor drivers to the step and direction pins on TinyG. I haven’t done it, but I thought about it. In the end, it was less hassle for me to drop to 24 volts than buy four drivers.

    Also, I don’t know how your software will interface with TinyG.

    By the way, are you sure you fried the board and not the power supply?

    I hope that helps.

    Tom

    • This reply was modified 10 years, 10 months ago by tomking505. Reason: addition
    November 14, 2013 at 5:29 pm in reply to: 32x Slow Mo Motor Movement #4946
    tomking505
    Member

    It seems to only happen with this one geared motor. So, not a TinyG problem.

    But when slowed it down to 1/32, I was amazed by the size of the glitch.

    Factory in China says they will replace it.

    November 14, 2013 at 5:26 pm in reply to: TinyG Homing & Limit Switches #4945
    tomking505
    Member

    Has anyone used opto interrupters as limit / home switches?

    I wouldn’t mind seeing the circuit you use.

    Thanks,

    Tom

    November 6, 2013 at 10:26 am in reply to: XBee serial attachment to TinyG #4917
    tomking505
    Member

    >massive power substation across the street
    >ever-present audio hum in the air
    >it stands to reason that the RF spectrum is a mess too.

    If the substation is close enough to be heard, what is the chance that your xbees aren’t hearing it, too?

    Have you taken your radios and TinyG home to try them without having a wideband radio transmitter across the street?

    October 30, 2013 at 10:20 am in reply to: stuttering stepper #4899
    tomking505
    Member

    Sure. I bought it from StepperOnline.com. It has a 1:13 planetary gearbox. I bought only one. It is above average in quality compared to my other steppers.

    Here is another slowmo video: http://youtu.be/CVxtsTw1AF4

    Thanks,

    Tom

    October 29, 2013 at 11:37 pm in reply to: stuttering stepper #4892
    tomking505
    Member

    I tried setting microsteps to 1 ad 8. Step angle is correct at 1.8. I tried several power levels. I took off the planetary gear, and the problem is in the motor, not the gearbox. My other motors seem happy with TinyG.

    I am trying to remember how to drive a motor right from an arduino, to have better control of each step.

    October 26, 2013 at 12:04 pm in reply to: new emergency stop? #4873
    tomking505
    Member

    In the message above, I should have said ICSP, not SPI. ICSP is In-Circuit Serial Programming. Sorry.

    October 26, 2013 at 11:39 am in reply to: New v8 board diagram #4872
    tomking505
    Member

    Also, speaking of the fan power, the sensor wire is not connected. I verified this on the schematic. It is just there because many fans have three pin connectors.

    This also means that TinyG is compatible with 2, 3 and 4 pin fan connectors. For a two pin connector, you connect it to the two pins closest to the reset button. If you use the other two pins, nothing bad happens. For a four pin fan, you connect it so the extra part of the connector hangs off the end closest to the power connector.

    This could all be added to a page which explains what each section of the board does.

    October 26, 2013 at 11:05 am in reply to: New v8 board diagram #4868
    tomking505
    Member

    Actually, I use my reset pins with an emergency stop switch, the same way. Maybe not exactly what the makers intended, but it has saved me a couple times.

    • This reply was modified 10 years, 11 months ago by tomking505.
    October 26, 2013 at 2:20 am in reply to: New v8 board diagram #4866
    tomking505
    Member

    Better?

    https://github.com/synthetos/TinyG/wiki/TinyG-Start

    We might want to create a page which explains what each section of the board does. I’m not clear on the SPI for example. That info might exist in another version of the wiki, but I don’t see it part of the V8 wiki.

    October 26, 2013 at 12:46 am in reply to: New v8 board diagram #4865
    tomking505
    Member

    I assume the board resets if you short the two reset pins. I confirmed that is correct. Looks like you could wire up an extension to the reset button.

    As for the fan connector, I agree. The original diagram wasn’t marked. Since there are 2, 3 and 4 pin fans, it would be nice to have the specific pinout. I just went down and checked with my meter. I will alter the diagram.

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