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This is a question for those who had experience with the KL-300 spindle or similar 300w 60000rpm chienese spindles, Did you have an acute, high pitch noise from it? and what about runout? I have...

I wish to upgrade my standard 3Nm steppers with something better, closed loop. Cant decide between these two:

This one is very powerful, 12 Nm and cheaper, only 2 phase...

awesome job!
wich mixture and epoxy did you use?

What about the idea of using a sheet of glass as the mold base to copy its flatness? Im not sure if I will find the rigth type of epoxy in here (Argentina) that will self level...

Sorry guys if...

Dont know about A3144, in datasheet, the a3142 seems to have a very stable operate and release points over an "ambient" temperature range (>-25º,<50º) but no such information is provided for 3144 and...

I really like this solution! very clever.

Im trying to build my self a couple of this sensors, however the only similar sensor there i could find in here (Argentina) are the SS549AT, wich...

I bought the ff/fk types from chai and have less than 0.007 with stock bearing. Ill replace the bearings with something better in the future and will post my results in here, maybe in the next 30...

I didn't have any problem with mines, please tske some pictures and Ill try to help you
Did you bougth it from chai?

Hi Bear: thank you for your answer.

The main reason there im only looking at Chai's products and not other deals is because I would like a trusted source of replacementes, if a buy a C5 deal I...

anu estimation on the cost in single units?

Hi: Im in Argentina, getting the rigth parts for a relatively accurate router in here is a tad difficult and the local money rate to the dollar does not make things simpler. I m in the process o...

When will the GM line, specially de gm540, going to be released? any news?
Lets pray to our Good Mariss to release it soon! :P

-heatsink mount
-over temperature protection
-Larger db9 conector screws (the current ones are waaay to short and imposible to screw)

Hi Kreutz:

Congratulations an this amazing desing, this is by far the best diy unipolar driver on the net!

After spendig lots of time studing it, and searching for available parts here in...