I NeeD HeLp PLease AM882 a good choise

[Jonathan]

I see a reason.!!!!. . . . They are better.!! . . . and the price difference is not enough to justify not taking advantage of there more advanced features like better resonance handling and stall detect.

Just because something that it better is available doesn't mean you need something better. The machine will run perfectly well with DQ860MA drivers.
The cheapest AM882 drivers on aliexpress are currently £56.18 each, versus £37.65 for the DQ860MA. In my opinion it's not worth the extra £18.26 when the machine will be fast enough with either.
If concerned about stalling, then by all means get two AM882 drivers for the X-axis, but save £36.50 and get cheaper ones for Y and Z.

[JAZZCNC]

In my opinion it's not worth the extra £18.26 when the machine will be fast enough with either.
If concerned about stalling, then by all means get two AM882 drivers for the X-axis, but save £36.50 and get cheaper ones for Y and Z.

Nope sorry don't agree at all.!! . . . . Told you before It's not all about speed and the Am882 are so much smoother it's worth paying £18 just for that IMO without all the other advanced features. Why have a lesser machine when for just few quid more it can be all it can be.?

[EddyCurrent]

@Jonathan, I agree there is no need to buy more than you require and I'm not an expert on all the different drivers but for £36 I'm not taking any chances. I once read somewhere a long time ago about a bloke buying power tools, he said he found it always paid to select the model you could afford then buy the next model up.

[jpsicilia]

Thanks for help me guys, really.
I bought the screws today, one less thing. Jonathan I can only buy in aliexpress and eBay, I could not find the nema23 you recommended, I have looked similar but I dont know what I need to look about the inductance, could you tell me what models I shoud look.
And about the Linear Motion they offer me a similar exchangeable for u$s 622 usd instead of the hgr15 for 850 uss, what do you think? should buy it or go for hgr15?

[Jonathan]

I bought the screws today, one less thing. Jonathan I can only buy in aliexpress and eBay

Then you're basically stuck if you want them for a reasonable price. Will CNC4YOU not ship to your country? If not, then you need to find 3Nm (425oz-in) motors with 3.2mH phase inductance. They generally have 4.2A current rating.

And about the Linear Motion they offer me a similar exchangeable for u$s 622 usd instead of the hgr15 for 850 uss, what do you think? should buy it or go for hgr15?

It sounds like they're offering you a different brand of rail, e.g. LG or TBI, which is probably fine. Not many people here have bought them yet, so it's hard to compare the quality and even then the differences are likely to be so small it's hard to quantify. The TBI brand rails I got from aliexpress seem fine, so next time I need some I doubt I'll get Hiwin.

[JAZZCNC]

It sounds like they're offering you a different brand of rail, e.g. LG or TBI, which is probably fine. Not many people here have bought them yet, so it's hard to compare the quality and even then the differences are likely to be so small it's hard to quantify. The TBI brand rails I got from aliexpress seem fine, so next time I need some I doubt I'll get Hiwin.

I've had several sets of TBI linear rails now and they have been fine and while not quite smooth has Hi-win they are still more than good enough and lot cheaper. I've been using SBC Linear rails n.mnow for years and they have been good never given me any trouble, I run them on my own machine and have punished them quite a bit so know they can stand hard life but the TBI feel and work just has good so I've no reason to doubt they will be just has good.!

Chai is now selling them for those that don't know.!!

[jpsicilia]

I bought the rails to linearmotionbearings2008 in ebay usa from a person call Chai ,linearmotionbearings2008 on eBay , I believe its the same guy. He offer the linear rails.

[jpsicilia]

Then you're basically stuck if you want them for a reasonable price. Will CNC4YOU not ship to your country? If not, then you need to find 3Nm (425oz-in) motors with 3.2mH phase inductance. They generally have 4.2A current rating.



It sounds like they're offering you a different brand of rail, e.g. LG or TBI, which is probably fine. Not many people here have bought them yet, so it's hard to compare the quality and even then the differences are likely to be so small it's hard to quantify. The TBI brand rails I got from aliexpress seem fine, so next time I need some I doubt I'll get Hiwin.

Hello guys I try to follow your advice in all the buys. I bought this models, wt57sth115-4204a, and I find this on internet .
I ask for low inductance as Jonathan told me. Ibought this in October 2013 and after 1 month of travel and the rest of the time in ARGENTINA CUSTOM y recived this. Some times I want to leave this country!! But my family is here.
Thank guys I really apreciate your time.

[JAZZCNC]

I ask for low inductance as Jonathan told me.

Great good to see you took Jons good advise. Those motors while still a little higher than some motors of same power are still have low enough impedance not to be restrictive.

I got your PM and tomorrow will be intouch.