Fleep, How much telescope are you trying to drive? Do you have a Coronado PST or or similar Lunt solar scope? For tracking the sun you should be fine. Also, Do not create a new topic/message when you

Fleep, For starters, use Stepperonline's precision planetary (PLE series). You buy the planetary and the motor separately. It will run you $65-70 for the pair (vs$59 for above). The precision planetar

Howard, Thank you! That makes perfect sense now. Looking at them again, yes they look like protection diodes and not MOSFETs. So, you don't need the bottom board for our purposes. I wonder why Trinami

Eugene, I just looked at what you are buying, they look identical to what I purchased, yet they are rated at only 35V. Note my comment about board overhang in my previous post. This will apply to the

FYI, Bigtreetech website TMC5160 Back in stock on 26th,May You can pre-order, $16.84

Agreed. My point is the "chip" alone can drive 3.5A, and the board below has the Mosfets. The pins seem to be pass through, from pin to header and to pin again, so I am curious as to how the pins are

I ordered a pair of these QHV5160 for $17 each. They are the high voltage variants of the TMC5160, but they have extra pins that need to be cut away and they overhang on one end. There might be suffic

Eugene, The 5:1 is also a good choice. With a NEMA23 I suspect you should have enough torque. The PLE series is only $50, if you make a mistake and need to go higher, it's not a huge expense. The othe

Here is one converter that will take up to 75V. It should be a drop in replacement (check input and output capacitor requirements). 1.5W should be plenty. About $11. Bob https://www.mouser.com/Product

I think I am the droid you are looking for... There are two Roberts on this thread. I am using a precision planetary from Stepperonline (PLE series), and I get around 1 deg/sec reliably. I have a 400s

George, I read parts of the datasheet. It does have a open load flag if the target current is not reached, but it does nothing about it. It is for the user to initiate action. See Par.11.3 last senten

George, Ouch is an understatement! My whole career has been focused around reading datasheets. I look at that one and my eyes bug out and I get a migraine. It is often difficult to ferret out the info

George, That is what the simulation shows. We can't get around the inductance of the windings, you can't just turn the pot or set the current and have it violate the basic inductance laws. I think it'

George, Mike, Robert, I've said this before, and I wish someone could confirm my findings. When I was running my set up and trying to get my Losmandy conversion to run faster, what I found was that th

Chad, Very creative! It makes a nice clean professional looking implementation. Kudos! Bob

I use a 10:1 precision planetary on a NEMA17 motor. Adding a planetary will slow down the slew rate, but then everything is a tradeoff anyway. I am not trying to swing at a baseball with my scope, so

Guy, From your video, it sounds like your motors are stalling during guiding. What are your current targets for the motors during slew and guide? With those TB6600, do you even have that selection? As

The last picture is best, BUT you must connect the two ground systems together!!! Put the two supplies next to each other and run a ground between them. Make sure the supplies are isolated!! Keep all

Chad, Sorry, I call you "Chris" several times. Got you confused with someone else. Old man brain fart. Humble apologies. Bob

#diy

Chad, Take the lemons and make lemonaid. You have some nice proven concepts you are embracing, and I think some of the criticism you are getting are people trying to help you avoid pitfalls, although

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