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### Author Topic: 1/2-10 5 start acme screw MAx Speed  (Read 7842 times)

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#### CNCexplorer

• 33
##### 1/2-10 5 start acme screw MAx Speed
« on: March 23, 2013, 09:39:27 PM »
Hi,
Could any one know of a link for a  machine running on a 1/2-10 5 start screw, I wanted to get rough idea of what kind of max speed is possible with that screw.

Thx.

#### RICH

• 7,413
##### Re: 1/2-10 5 start acme screw MAx Speed
« Reply #1 on: March 24, 2013, 07:09:59 AM »
Max speed is depandant on more than just the screw since that is only one component of the system.
There is a nice stepper calculator in Member's Doc's where you can easily evaluate different axis parameters
and see the result.

Thus you need to look at the big picture namely, software, computer, drive / external devices, axis specifics ie; motor, screw, reductions etc, and the machine specifics.

Note that you must compare apples to apples and never apples to oranges even if you find a link.

RICH

#### CNCexplorer

• 33
##### Re: 1/2-10 5 start acme screw MAx Speed
« Reply #2 on: March 24, 2013, 12:55:10 PM »
I completely agree with you RIC. And I am fairly new to the CNC and haven't given much thought into the science behind the CNC machine.  I just wanted to define the speed at which  i am running the machine at for example min, medium, max. My machine is compose of 60" linear guided rod system and a 1/2-10 5 start acme screw with nema 34 on y axis and nema 23 on x axis. SO far i have only completed a Y and X. I was able to hit 450ipm on y and 250ipm on x.
The reason I would like a good amount of speed because I might be using it for engraving and PCB milling purposes.

#### ger21

• 6,287
##### Re: 1/2-10 5 start acme screw MAx Speed
« Reply #3 on: March 24, 2013, 01:51:49 PM »
Motors, drives and power supply voltage play the major role in speed. The amount of weight your moving, and your acceleration settings can also play a big role. You can go faster with lower accel if you have enough room to get up to speed. And if you have very high accel settings, your max speed will be lower.

A ton of people at cnc zone have been using 1/2-10 56 start for years. Generally, you can expect speeds between 200 and 500ipm.

On screws close to 60" in length, you may see severe whipping when the screw spins faster than 500rpm (250ipm).
Gerry

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