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tomking505Member
How does the Ulitmaker demo manage it??
Not arguing with you, just trying to understand this.
Thanks!
Tom
tomking505MemberThanks, 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
tomking505MemberThe 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.
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tomking505MemberWhat kind of drivers do you have?
tomking505MemberI 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 11 years ago by tomking505. Reason: addition
tomking505MemberIt 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.
tomking505MemberHas anyone used opto interrupters as limit / home switches?
I wouldn’t mind seeing the circuit you use.
Thanks,
Tom
tomking505Member>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?
tomking505MemberSure. 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
tomking505MemberI 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.
tomking505MemberIn the message above, I should have said ICSP, not SPI. ICSP is In-Circuit Serial Programming. Sorry.
tomking505MemberAlso, 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.
tomking505MemberActually, 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 11 years ago by tomking505.
tomking505MemberBetter?
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.
tomking505MemberI 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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