Hello Guest it is June 25, 2024, 07:39:00 AM

Author Topic: Half Speed Drive  (Read 2062 times)

0 Members and 1 Guest are viewing this topic.

Re: Half Speed Drive
« Reply #10 on: June 27, 2019, 03:10:01 PM »
Hi,

Quote
Those Vexta's are serious stuff, and pricy

Yes they are. I paid about, on average, $250 for each stepper and 10:1 low lash (less than 2 arc min) planetary gearbox.
The drivers, on average, cost $150 each. Of course it was all second hand.

Not withstanding the cost I have never regretted the decision, it has been superb. I have not 'lost a step' in four years
and with the 10:1 gearbox and 5mm pitch (C5) ballsrews have 15kN thrust. Of course the 10:1 gearbox means its slow,
my 'rapids', if you can call them rapids, are 1200mm/min. I limit the acceleration because my 250kg mill starts throwing itself
around the workshop unless I tie it to the wall!

I was new at CNC at the time. If I had to make the same purchasing decisions today I would go for Delta or DMM servos instead.
Good AC servos have much reduced in price over the last few years.

Craig
'I enjoy sex at 73.....I live at 71 so its not too far to walk.'