Are these stepper motor kits good? Or Chinese fly-by-night vendors?

[RCW]

These kits look too good to be true. Anyone had experience with them?

SHIP from USA Warehouse 3Axis Nema34 Stepper Motor Dual SHAFT1600OZ 3 5A CNC Kit | eBay

How's the best way to calculate what size to use on each axis?

On my old Gorton each shaft requires the following to move (no gearbox):

X axis: 64 inch ounces
Y axis: 240 inch ounces
Quill: 160 inch ounces
Knee: 1700 inch ounces

Any suggestions appreciated!

Thanks.

Bob

 

[Stuart Caruk]

The Wantai ones work just fine, I've bought a couple sets. If you need, or expect any kind of tech support at all, don't buy them. The tech support for most Chinese products is non-existent.

The quality has been gradually getting better. A few years back, they built the boards in a single pass wave soldering technique. The small components were fine, anything larger never even had enough solder sucked up to cover the pads and bad solder joints were common. It required the end user to dissassemble the components to hand solder the larger items, or you'd end up blowing things up from the loose connections that would develop after a couple weeks.

 

[RCW]

Thanks. I appreciate your responding. I suspect that I will need customer support. Any recommended sources?

 

[LFEngineering]

I paid a bit more and got all my stepper motors and controls thru Probotix. IMO their tech support and reputation was worth the extra coin.

CNC Stepper Motor Driver Systems & Hobby CNC Routers:: PROBOTIX™

 

[madmachinst]

I am susp[ecting that you should go with an outfit like PMDX if you are a hobbyist. If you want better mach motion. YOU PAY ........GET. That lesson has been leanred by me with $3000 in the trash.

 

[RCW]

Thanks, Madmachinist! That is probably good advice.

I appreciate the willingness of others to share their experiences. I can't pay back your 3 grand, but perhaps it will save me from making similar mistakes.

What is your current system like?

Bob