After posting my last message it occurred to me that *if* you don’t clip the clock pin it may be that the 10k pulldown isn’t not sufficient to “ground” the pin if the signal on the onstep board is “fi

I purchased bigtreetech TMC5160 v1.2 drivers. I have not powered them up yet. I was curious about whether I needed to ground the clk pin so I measured the resistance on the driver (while not loaded on

Oops...meant 0.075 ohms...coffee not working yet.

I went back after receiving info from the group and now see how to interpret the tmc5160 data sheet. All versions of the tmc5160 module from bigtreetech have the same sense resistor based on the max s

Thanks for help. I was aware that it was set via spi. I was concerned that the various versions (v1.0,v1.1,v1.2....) of the tmc5160 might have different sense riesistors and therefore require differen

I am building the onstep blue pill stm32 board. I cannot for the life of me find out what the sense resistor value is for the bigtreetech tmc5160 v1.2 modules that I purchased I realize that the curre

Paint black liquid tape over all offending leds

Re: CS32F103C8T6... A new clone? Quote Hard not to be confused about the 64/128 issue...particularly since it seems that even real STM chips read (depending on the tool) as 64K even though they have 1

You may want to check the web for discussions regarding "64K" stms. For example: https://stm32duinoforum.com/forum/viewtopic_f_28_t_3987.html I personally am skeptical that there are clone chips per s

The finding that 40% current works best is very interesting and something I have not heard discussed before. I wonder if it due to the non-linearity of the magnetics in the stepper...that going up bey

No need to microstep if it is working perfectly. That said the potential reason that it may be necessary for others is that microstepping makes you less subject to resonance issues which can result in

https://www.reddit.com/r/AskElectronics/comments/6oemtl/what_is_the_cause_for_the_hissing_sound_of_the/ This may explain the hissing sound. I have experienced with various drivers over several stepper

Howard, Regarding the RA rate correction...based on your experience, is it generally target independent (doesn't matter what object you are tracking) or are is there strong target dependence (I would

Very nice. Thanks for sharing the image. More juice to keep building! I saw that cluster at a Texas star party many years ago. Brings back memories.

Thanks for pointing me to the wiki. Do I understand that for RA rate correction you need better than arc second resolution and accuracy? If so that implies 360 degrees times 3600 arc seconds per degre

I am curious about encoder support and Onstep...is there something I can read that describes their use? Are we taking about closed loop tracking? Thanks.

I took a look at what I think is the minipcb2 board artwork and it looks like some plated vias under the teensy. They would not be subject to hand soldering. Would it be possible there is a dtefective

At the risk of offering something that is not relevant, could it be that the drive current is set way too low? Virus-free. www.avast.com

I found some pushbutton switches that I purchased for building an SHC and thought others might be interested. Note: they are not surface mount and they may not/won't fit the stock design without some

Using gravitational bias to “lean” against the gear lash sounds very good. The subject of backlash comes up frequently in small hobby cnc machine discussions. The $$ approach for linear systems is bal