"This kind of corporate behavior only underscores the purpose of DIY and Onstep systems" I think the opposite, this screws them and helps the DYI, no? I have a Ci-700 and was thinking of doing this go

Thanks for that comparison KB, good info. I already have a G11/Gemini/10' Dome setup for AI, the rDuinoScope is one low cost option for just visual and is controllable from Stellarium. I always use a

I am new to OnStep, I just skimmed the documents, wow, great project, lots of depth, well done, I think when I get around to converting my ci700, I will try OnStep.

Thanks for the reply. You mention the "The STM32 is ~ $35", what board is that? I am currently looking at the stm32f407vet7 board ($10) for another project. https://www.aliexpress.com/item/32618222721

I just found Onstep a week ago, been reading/searching, project looks very impressive. My ci700 currently has Gemini servo motors with 250ppr encoders and 25:1 gearbox (with 180t RA/DEC gears). What i

I am looking to buy the stm32 Kit C to use on my ci700 that has Gemini servo motors with 250ppr encoders and the arduino pro mini (with https://github.com/misan/dcservo) with A4950 motor drivers. This

Wow! Fast and excellent replies, many thanks guys getting me up to speed quickly!!! On to more reading :)

Thanks for the replies! The RA should never stop or go backward when tracking (aka eastward weight bias keeps the slop in gear-train always in mesh, on the driving side), the 10,000 encoder would be 4

Thanks Khalid, I have acknowledged that I have been thoroughly warned! :) I already have the servo motors mounted, the A4950 drivers and have one arduino pro mini, so cost wise will be two bucks for a

I will order the blue pill kit C tonight when I get home. For the arduino pro mini, do I want the 3v or 5v version? What kind of slew rates are you guys seeing (and what mount) ? (4/6/8 degrees/sec) F

Its not my goal, but if its going to be 2 degrees/sec or less, that might be a slight bummer. Servo motors have a much higher speed range compared to steppers in general, but there is a few factors (g

Regarding steppers, thanks for the 0.9 degree motors! I have never seen these before (only down to 1.8 degree), but I don't play with them much. You mention low inductance. Since the ci700 is a step a

@ simingx@... 2:41am #14897 Thanks, perfect info. Its sorta sad with 4 decades of electric motor use (mostly racing), I dont have much stepper motor experience. I see microstep rates upto 256, general

I ordered a couple days ago the stm32 blue pill kit-C, but havent seen a email to pay for it. I am not in a hurry, just wondering. On a side note, where to find the lowest cost TMC5160 drivers? (anyon

Interesting stepper with closed loop, but $$$ https://www.banggood.com/MKS-SERVO42B-Nema17-Closed-Loop-Stepper-Motor-Kit-with-Display-Adapter-Board-for-3D-Printer-Part-p-1602157.html?rmmds=search&cur_

So comparing these two options are not very different in price: 1. $14 stepper motor and $15 tmc5160 drivers = $29, 2. $33 MKS-SERVO42B-Nema17-Closed-Loop-Stepper (the link I posted above to BG site),

I found a box of stepper motors: 85x85x66mm 1.8 degree 2.4v 4.5a 56x56x75mm ?? (with driver) 42x42x40mm 1.8 degree 2.8v 2.0A (with encoder / driver) 42x42x23mm 1.8 degree 2.0v 2.0A (with encoder / dri

For only $4, it has quite a bit more power the blue-pill Any interest from the devs or is it just too much work or not nessary, or? Stm32F4 EEdit link.

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Thanks for the reply. In another post, it "seemed" adding extra stuff (like encoder inputs) in the stm32 was "not" the direction of OnStep, maybe I misread what was wrote. Anyway, I have a few of the

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I see, thanks for the reply. When I use STM32 F1, F3, F4 (betaflight FW for drones), they all can store 100+ variables for flight control tuning/function adjustments. Is this not what you need because

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