Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: cncfreakcncfrea on July 01, 2014, 05:21:39 AM

Title: Knee Mill Conversion
Post by: cncfreakcncfrea on July 01, 2014, 05:21:39 AM

Hello all,
           I had this Knee Mill conversion before and decided to put the Dc servo back again. I need some help on step/unit calculation:
The ballscrew pitch = 5mm
Gear ratio: 1:4 (the gear on the dc motor side is a T18 and the ballscrew left side is a T72 aluminium timing gear)
The encoder used is a US digital E5kit, encoder CPR = 500

(http://i1220.photobucket.com/albums/dd459/happytriger2000/Forum/Machsupport/Knee%20Mill%20Conversion/IMG_6565.jpg) (http://s1220.photobucket.com/user/happytriger2000/media/Forum/Machsupport/Knee%20Mill%20Conversion/IMG_6565.jpg.html)

(http://i1220.photobucket.com/albums/dd459/happytriger2000/Forum/Machsupport/Knee%20Mill%20Conversion/IMG_6564.jpg) (http://s1220.photobucket.com/user/happytriger2000/media/Forum/Machsupport/Knee%20Mill%20Conversion/IMG_6564.jpg.html)

thanks,
 

Title: Re: Knee Mill Conversion
Post by: cncfreakcncfrea on July 01, 2014, 07:47:08 AM

Found the stepper calculator by StepperCalc_ALENZ_rev1:
(http://i1220.photobucket.com/albums/dd459/happytriger2000/Forum/Machsupport/Knee%20Mill%20Conversion/stepcalcuator.jpg) (http://s1220.photobucket.com/user/happytriger2000/media/Forum/Machsupport/Knee%20Mill%20Conversion/stepcalcuator.jpg.html)
What is thread starts and Lead?

Title: Re: Knee Mill Conversion
Post by: Tweakie.CNC on July 01, 2014, 08:00:31 AM

Thread starts is the number of individual (separate) threads on the screw -I would assume your is single start.

Lead is the calculation of how many mm the nut moves for one complete revolution of the screw.

Tweakie.

Title: Re: Knee Mill Conversion
Post by: cncfreakcncfrea on July 01, 2014, 09:41:27 AM

Ok, thanks.