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October 31, 2013
about 3 years ago
I've noticed, even with thermal gap filler, when I turn off my router (dewalt 611) on low rpm, it makes the Z axis jump up about 2 or 3 cm, a few times. When this happens, I can't control the cnc from universal G-code sender, and have to reset everything.... This is frustrating when doing jobs that require multiple endmills ( it's difficult to recalibrate X and Y multiple times). I've noticed it doesn't seem to happen if I turn the speed of the router up a lot before turning it off. To avoid this all together, I plug the router into an outlet that is controlled by a light switch.
I was really bummed to see that the Shapeoko 3 Sprakfun delux kit I just received didn't include the 2016 summer updates that now are included in the Carbide 3D version. Are there plans to update the design?
about 5 years ago
Seems to be working alright, and I've heard back from a couple people who say it shouldn't be an issue.
Would it be bad if I used two of these drivers and shared the direction pin between two stepper motors (in order to save an I/O pin on my arduino)...? The motors will only be spinning one at a time. I'm using these steppers: https://www.sparkfun.com/products/10848. I'm just wondering if it would draw too much current and fry that I/O pin on my arduino uno. If it is ok, would it I be able to safely share between 4 of these steppers with 4 drivers?
What would I look at to find this out?
On the Arduino side I'm guessing the 40mA max current per I/O pin.
On the driver side is it the logic supply current or motor supply current... or something else?
about 6 years ago
I meant to say when you plug in all those things respectively. Anyway, I tried it with the blink sketch and it seems to work.
Can I upload to the 3.3v mini using an uno R3 board? Would this work - take out the ATmega328 chip on the uno and connect BLK, GND, VCC, RXI, TXO, GRN (on Mini) to Ground, Ground, 3.3V, RX, TX, reset (on the uno) and then upload a sketch selecting the 3.3v mini board from tools in the Arduino IDE?
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