One thing not mentioned with interchanging stepper motors is the internal resistance as related to operating current. With a modest amount of current a stepper motor with a higher internal resistance can become quite hot if not operated in a dissipation efficient mode. If the controller utilized all...

You can easily modify the Jansjo LED lights as shown below and use 5000K LED COBs with higher output. If you don't want to build a custom LED controller, you could use a standard power supply like shown in your setup image but watch the Jansjo head temperature. The custom controller allows continuou...

Here's a link to modifying a IKEA Janso.

https://www.photomacrography.net/forum/ ... &hilit=COB


and modifying a Godox

https://www.photomacrography.net/forum/ ... OB#p264797

Best,

I have and use a Thorlabs XT95 based setup Thanks for sharing Mike, makes me wish I had all of these components and could try multiple setups before deciding on one. I'd like to have a vertical-to-horizontal convertible setup and my current one using breadboards is perhaps not best suited for that....

These iShoot clamps are the best, they can be found on ebay for ~$20. The short 1/4" (or 3/8?) countersunk channels either side of the centre thread look like they could be very useful! I'm always finding it a challenge to get Arca clamps with more than one point of connection that have a hole patt...

Hi Cam, I don't have any of the 66m rails so can't compare, but the XT95mm rails don't have a Dovetail. These are more like the conventional extruded bars that use the "T" nut type mounting scheme, and Thor has the "T" nuts and other fasteners for them. It's an extremely well engineered rail, and if...

I have and use a Thorlabs XT95 based setup, it's very sturdy and works well in either V or H modes. Classic design with large heavy thick optical base with a 1000mm XT95 half rail bolted to the optical base, and a 600mm vertical bar XT95 full rail mounting to the horizontal half rail with a Thorlabs...

Vish_007 wrote: ↑

Tue Aug 25, 2020 1:45 pm

USPS delivered, envelope in near pristine condition !!. Chip little bit chipped, but OK

Lucky you, mine arrived shattered into over 20 pieces!!

Best,

Some of best companies and labs use Thorlabs, Newport and PI (etc) stuff for R&D. Notice "Stackshot" isn't in the list. They can test their rails and spew out a datasheet, but I'd rather pay $600 than $2000. The comment raised for me the question: are there other (fully) specified (parameters) (plu...

Wonder if they have a type of structure where the light transmission varies with intensity, like the sunglasses that get dark when exposed to bright light, then return to somewhat clear when the intensity drops?

Best,

When these controllers coupled with the superb THK rails KR15, 20 and 26 with quality 400 step motors you have, think this is the SOTA for stepper based focus rails. Probably true, but I got the sense that the OP was looking for a more plug and play solution like I was when I bought the mjkzz contr...

Ray, Think the Trinamic device you have/had is an old device and not the same as what we've recently (past few years) developed based upon the modern TMC5130, 5160 and 5072 BOB devices. The hardware motor driver and micro controller are integrated on the same chip, as is the interface. This is a com...

Check out the many threads on the Trinamic Controllers, they are superb with the THK KR20. The TMC5130, TMC5160 and TMC5072 all work well with the THK KR20.

Best,

I looked at the video which was linked in Mike's most recent post. Youtube took me down the rabbit hole to a more recent video by the same equipment reviewer. It seems that Godox have a new 150W LED video light, the UL150. This is silent. The video claims that it is cooled entirely passively. This ...

Nice to stumble across this thread again as I just picked up the Godox SL-60W. While not as the same as this one, it's good to know Godox's claims hold up and to have some data on the output with different attachments. The "snoot" was a standard black anodized aluminum Bowens type ~200mm snoot with...