Thanks Khalid. Cruising around the SCP is a never ending joy.

JoAnn Thanks - following the great job you have done on yours. I've just used a plastic jiffy box from my local electronics store. Cut out the holes and filed down (no close up pics shown as its a bit

Gave my mount a test run last night. I'm only little NEMA14 steppers 200 step/rev with 2.5:1 gear ratio (144:1 worm) on an EQ5. Built the miniPCB with TMC2130 running in stealthmode 32 microsteps, so

Serge I use an Arduino nano - DHT22 to measure ambient temp/humidity, DS18B20 to measure mirror/lens temp, mosfets drive the heater. Can run by feedback control, or manually. Use a little 129x64 OLED

Thanks Raymond. I found a local ebay seller that has some of these OSMTEC steppers. So you running a 2A stepper at 1A (think) but at 40V. And they have that stepper plus a few others. I'm still wonder

I'm a bit restricted is Australia as to stepper motors I can choose. For example, while there is a distributor of oriental motors here, they seem to carry very few of the motors on the oriental websit

Matthew I'm in Aus. I got the bussed resistor from Mouser Hong Kong. They are reasonably priced and very fast. Shipping is a bit so I bought a bunch of stuff. They have a huge range of things. Hardest

Pedro +1 on cleaning out the EQ5. I just got mine second hand and it was stiff AND had loads of backlash. Cleaning out the gunk grease and applying superlube fixed the stiffness. It should then be eas

There's probably a thread or two already dedicated to this, either here or back in the yahoo forum. If so, just redirect me there! I'm trying to get my head around selecting the optimal stepper motor.

Howard Thanks for checking all of that. So, amazingly I haven't completely lost the plot and it appears I've done it correctly. Must be something weird about my ebay tmc2130s. I'll try and source some

Nicely done JoAnn

I have Polulo 1209s. 200 step, 2.7V 1A. Have tried with Vref = 0.7 and 1V. Using a 12V supply.

Pedro I think mine is an EQ5pro mount - as it came with NEMA14 steppers. I bought it second hand and the controller was missing. It has cleaned up nicely, have relubed gears etc and all looked in good

That's starting with the following, which seems to work well in tracking & slewing #define StepsPerDegreeAxis1 6400.0 #define StepsPerWormRotationAxis1 16000.0 #define AXIS1_DRIVER_MODEL TMC2130_VQUIE

If I change to 256 (and don't change StepsPerDegreeAxis etc) both tracking and slewing are much slower. And change to 8, both are much faster.

Pedro I'm also motorising an EQ5. Still waiting for some gt2 pulleys. I will either end up with 2.5:1 on these, or 3.75:1 if I can fit in the larger pulleys. Like you boxed controller! Chris

Howard For my testing of the alpha "on the bench" . Used alpha version, with miniPCB VQUIET #define AXIS1_DRIVER_MODEL TMC2130_VQUIET #define AXIS1_MICROSTEPS 32 #define AXIS1_MICROSTEPS_GOTO_OFF ditt

On Wed, Jan 31, 2018 at 05:47 am, Chris Vaughan Howard I'm using alpha version. And correct stepper numbers 1 and 2 for the two motors - it was a typo in the post. I'm now using the configuration gene

Khalid I used the configuration generator. It came up with DRIVER_MODEL TMC2130_VQUIET AXIS1_MICROSTEPS 64 AXIS1_MICROSTEPS_GOTO 1 This came up with an error saying I had to have same u Steps or use _

Maybe this problem is because I bought cheapo ebay TM2130s, but I can't source the proper ones in Australia. I've got the miniPCB built, running the current alpha version via bluetooth, with polulo120