Quote Originally Posted by JAZZCNC View Post
You won't have any issues with profile that size at this short length. I've built several machines around that width and wider using 120 x 80 and it is more than strong enough.

On my larger machines I use 160 x 80 profile with much wider gantries and in fact, I'm currently building a 10 x 5 with gantry over 2mtr wide with 4.5Kw ATC spindle that is around 15Kg which it doesn't even know is attached.

By adding plates and using oversized Profile all your doing is adding weight which is making motors etc work harder and costing more money and performance. Overbuilding isn't always a good thing and can be negative to machine performance, esp for routers using steppers that work at high feeds where torque is lower.
First I should maybe explain what I intend to use the machine for. I want to be able to mill aluminium very efficiently and also mild steel with good results. I have seen quite a lot of people being able to do that!

I already have the servomotors I intend to use with 1605 ballscrews & 20mm hiwin linear rails. The servomotors are 180W JMC iHSV57-30-18-36, see the link for specs:
https://www.sorotec.de/shop/JMC-Serv...-min-7908.html

So you believe I could downsize the gantry to a 80x160 profile and not notice any significant difference in cutting performance? If yes, I will definately downsize.

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