Upgraded Aluminum Z Axis Assembly V2 Kit, with Spindle Motor Mount for 775 Spindle and 300-500W Spindle, 43mm & 52mm Diameter Spindle Holder for CNC Machine 3018-PRO

Good

Lovely upgrade , very sturdy being metal

Short version: This is a very nice upgrade for a generic 3018 CNC engraver/router, albeit at the expense of a little X travel. I assume it's a direct replacement with no drawbacks for a Genmitsu machine, but I don't have one of those so I can't comment. Long version: I bought this because my generic CNC3018 machine's original plastic Z-axis/spindle holder broke in a non-repairable way. This looked like a decent upgrade, so I was happy to pay the money for it (almost as much as I paid for the whole machine). It fit like a champ; and with the included adapter sleeve, it held the motor with no problems. It has two leadscrew nuts, which should all but eliminate backlash, which is nice. And, being made of aluminium, it should now out-last the rest of the machine! As an added bonus, one gets a bit more "Z" travel (54.8mm between limit switches - although once homed, the 1.5mm "backoff" value means that's actually only 53.3mm of useful travel). The limit switches are already installed, which is great. You need a 3-pin JST 2.54mm plug, of which the top 2 pins are connected when either top or bottom limit switch(es) are activated. I also like that the spindle holder can be removed semi-quickly (undo 4 screws, I think it slides out vertically - I've not actually tried it yet); either to put a larger spindle holder in - I plan to make a camera adapter so I can accurately line things up optically with a straight-down vertical view. So that's the good stuff - and on that basis alone I'd suggest it's an excellent upgrade to a plastic spindle holder/Z-axis unit, and well worth considering. There's one minor gripe (and, in fairness, this is a problem with the original machine, not this unit): Due to the way the X-axis leadscrew is attached to the stepper motor, and the location of the stepper motor, you lose about 25mm of X-axis travel at the right-hand edge of the machine. The original mount had a recess which the shaft coupler fit into, whereas this unit does not have that recess. So the leadscrew nut hits the shaft coupler before the head hits the side of the machine. For machines with built-in limit switches, this will require a workaround. Since mine didn't have limit switches from new, I just needed to make a new bracket to move the limit switch I already added to be an inch further in. That done, my machine is back to full working order. Long story short - I'd highly recommend this as an upgrade for a regular 3018, if you can stomach the loss of 25mm of X axis travel.

Excellent. Was able to use it to cut copper alloys and aluminum.

Comme le commentaire ci-dessous que j'ai consulté trop tard, l'entraxe fait 72mm (pas 71 ;) ) et donc les montant verticaux de ma 3018 PRO (qui n'est pas une Genmitsu) ne correspondent pas.. donc pour rattraper les 3mm, comme ils tombent dans les trous existants, la solution que j'ai trouvé est de les reboucher à la résine, faire un gabari de percage et repercer les trous avec le bon entraxe..... (travaux en cours, je ferai une photo une fois terminé) si non le matos est clairement d'une autre qualité que la broche en plastique livrée d'origine, ca n'a rien a voir, ca sent le costaud et la finition est irréprochable, je mets donc un 5 car le fait que ce soit pas le bon entraxe n'est pas de la faute du fournisseur, d'autant que je viens de voir qu'il y avait en plus une image avec les côtes ....

Le moteur pas-à-pas de l'axe Z ne fonctionne pas.

I bought this to replace a similar, but plastic, unit that had way too much flex. It would not allow good cuts or engraving in harder materials. This unit is nice and rigid and now the CNC machine performs 500% better!

CNC--3018PROの垂直ユニットが故障したので購入しました、送りねじの挿入に手間取りましたが、付属マニュアルを参照し取付OKとなりました。Z軸方向が以前と逆なので配線1，3を入れ替えました。振動は取り換え前より小さくなりました。V溝エンドミルでの加工は改善されました。