Chinese 'Hybrid Closed Loop' steppers vs 'regular' open loop steppers

[Muzzer]

I used a Leadshine closed loop stepper on the Z axis of my Bridgeport conversion. It's the "Integrated Easy Servo" version, where the driver is built in to the motor, so you just feed it volts (36V?), step and dir, then it does the rest. Pretty tasty - and being Leadshine it just works.
Being a stepper, it makes an audible noise but nothing like some of the cruder stepper drives. You can tune it with their software if you think you have what it takes and there is a configurable output that tells you if it's out of position etc. Why go closed loop if you don't then check it's in control etc.

http://www.leadshine.com/producttype...y-servo-motors

There are quite a few clones around now (Aliexpress, ebay etc) but I've no idea how good those are. Note they only do 2-3Nm max.

Like this: https://uk.banggood.com/JSS57P2N-Nem...r_warehouse=CN

For some unknown reason, AliExpress are doing a 15% "11.11 discount" today, so I've risked the wrath of the Domestic Manager by placing an order for a couple of 600W servo motor / drives from Lichuan. 11 isn't even a Chinese lucky number as far as I know but perhaps that's where I went wrong during the many years I spent visiting the damned place. https://www.aliexpress.com/item/1005...191c4c4dmmZxSS For this, I blame a combination of beer, a late life crisis - and of course JAZZCNC, for recommending the buggers. No idea how well these will work out but I'll let you know.

[JAZZCNC]

For this, I blame a combination of beer, a late life crisis - and of course JAZZCNC, for recommending the buggers. No idea how well these will work out but I'll let you know.

It's ok I've got broad shoulders and I know you won't be dissapointed provided your not expecting them to match Mitsubishi's or Yaskawa's. I've got some on my Plasma machine.

To the OP then I've been using Closed loop in both Nema 23 and 34's for several years now, I stopped fitting standard steppers over 3 years ago as they just don't compare to closed loop. I wouldn't fit standard steppers these days as the price difference just isn't worth it.

Now to anyone on the forum who's looking to buy I've got a large shipment of Lichuan 4.5 and 5.5Nm 2 phase nema 24's with 70Vac/100Vdc drives arriving later this month which I'm willing to sell a few sets to forum members, also some large mains powered Nema 34's but only got a few sets of those coming.

[clutchslip]

Thanks for the other replies so far. Thankyou to Muzzer for the headsup on Lichuan on AliExp. JAZZCNC thanks for the above - I've found a couple of very useful comments of yours on similar threads regarding importance of power supply voltage etc. Plenty more reading and research to do on my part before I start spending any money....Muzzer your comment about the 'Domestic Manager' reminded me of an older guy I used to work with who used to recount every detail of his exploits to keep his spending beyond the control of 'the Chancellor' back at home.....

[Kitwn]

Muzzer your comment about the 'Domestic Manager' reminded me of an older guy I used to work with who used to recount every detail of his exploits to keep his spending beyond the control of 'the Chancellor' back at home.....

OK guys, I accept this should be a separate thread but a couple of you have mentioned the domestic budget issue...
Over the last 40 years of mostly happy if not continuous marriage I've adopted the principle that you cannot have two different standards of living in one marriage. Decide how much you can afford to allocate to hobbies per month, divide by two and that's how much you each have to spend. No arguments, no subterfuge, no deceit, no problem. If you cannot see the logic in this then you're living in the wrong century.

Best wishes from The Modern Man