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Thread: Epoxy Granite Portal Machine

  1. #25
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    Default Re: Epoxy Granite Portal Machine

    I have not much experience in using timing belt.. just using a long XL type one for gantry X-axis drive...but only last for 2 years time(broke). Now in my new machine I plan to use much stronger HTD 5M type for the axis drive....But for the spindle which is of 750~1kW servo motor(3000rpm). I firstly suppose to use HTD 5M as well. Now, I hesitate that if it will has the noise problem?! According to your suggestion GT3, it is of thinner in thickness, what type of strain and material it is? will it last long enough and suit for that power rating servo motor?



  2. #26
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    Default Re: Epoxy Granite Portal Machine

    The HTD is definitely a modern upgrade over the old trapezoidal (XL) timing belts. The difference is the modern curved tooth shape vs the old angular shape. I suspect that the GT2/3 may be even better, but only by a smaller amount. Don't worry about the thickness of the belt: it does not figure in the strength. It is the cords in the belt which matter, and there is only a single layer in any of them (for reasons of dynamics). Check the vendor specs, but I think even the 5 mm GT2 belt is rated at >10 kW at 3000 RPM. They are STRONG.

    Cheers
    Roger



  3. #27
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    Default Re: Epoxy Granite Portal Machine

    Thanks for the information. There is a picture of my CNC milling machine that is under building.Epoxy Granite Portal Machine-20191108_130019-1-jpg



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