Re: [CAD_CAM_EDM_DRO] HTD Pulleys
Posted by
cnc sales (hanermo)
on 2013-10-29 04:13:16 UTC
Motor power is not the problem at all.
HTD belts are good to about 100 hp, iirc, at 8000 rpm.
They are used to transmit power in auto apps, in this power range.
The limits are torque, tooth size, at low rpm.
5 mm/15mm HTD belts will all do over 20 Nm at zero, iirc.
And thats the minimum, the manufacturer approved range goes over 60 Nm.
You wont get 60 nm out of treadmill motors, even with servo peak loads.
A 2.5 kW industrial ac brushless servo motor, about 3x more powerful than yours, has a max 12 Nm continuous rating, and a peak around 25 nm.
The industrial one is more powerful because its well, industrial, meant for continuous use, and not a treadmill motor.
The treadmills tend to have about 17 mm shaft size, and the 2.5 kW about 25 mm.
HTD belts are good to about 100 hp, iirc, at 8000 rpm.
They are used to transmit power in auto apps, in this power range.
The limits are torque, tooth size, at low rpm.
5 mm/15mm HTD belts will all do over 20 Nm at zero, iirc.
And thats the minimum, the manufacturer approved range goes over 60 Nm.
You wont get 60 nm out of treadmill motors, even with servo peak loads.
A 2.5 kW industrial ac brushless servo motor, about 3x more powerful than yours, has a max 12 Nm continuous rating, and a peak around 25 nm.
The industrial one is more powerful because its well, industrial, meant for continuous use, and not a treadmill motor.
The treadmills tend to have about 17 mm shaft size, and the 2.5 kW about 25 mm.
Hi Jon,
The motors I have are rated 1.5hp continuous (2.5hp peak). They are new and were desitined for a treadmill. They appear to have a plastic rear housing and a shaft extension designed to take encoders although I will have to do a little machining to get mine to fit.
I have ordered a 24T and a 72T pulleys and a 25 mm wide belt for the X axis, I will order the rest when I have that axis under power, with the motor hooked up to a speed controller. I am not intending to use the machine at anything near the rated power of the motors.
Terry
>I've got 9.5mm (3/8") wide belts on my Bridgeport manual retrofit, and
> Can someone tell me if 5 mm x 15 mm HTD pulleys and belts are man
> enough to drive the X and Y axiz of my bridgeport clone milling
> machine fited with servo motors? Or should I use 8 mm x 20 mm (or 30
> mm wide) pulleys and belts?
if I turn the acceleration up just a little, it will break a belt literally
within a minute! And, my motors are quite wimpy. If you have strong
motors, I might recommend the 30 mm belt, and definitely go bigger than
the 15 mm.
Jon
-- -hanermo
Discussion Thread
2013-10-27 17:43:52 UTC
HTD Pulleys
Jon Elson
2013-10-27 18:18:55 UTC
Re: [CAD_CAM_EDM_DRO] HTD Pulleys
Steve Blackmore
2013-10-27 20:10:03 UTC
Re: [CAD_CAM_EDM_DRO] HTD Pulleys
cnc sales (hanermo)
2013-10-28 02:23:37 UTC
Re: [CAD_CAM_EDM_DRO] HTD Pulleys
2013-10-28 09:27:06 UTC
RE: Re: [CAD_CAM_EDM_DRO] HTD Pulleys
cnc sales (hanermo)
2013-10-29 04:13:16 UTC
Re: [CAD_CAM_EDM_DRO] HTD Pulleys
2013-10-30 14:33:57 UTC
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2013-11-02 13:32:04 UTC
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