Mach 3 control of DC Brushless motor?

[templecorran]

Yes, John, That's the one Jeremy used in his spindle design. Must confess I didn't notice the 1mm range in compression. After all, we were told as apprentices "that to be an electrician you need to be able to read or write, not necessarily both!"
I've now got a MSc in Electronics but keep that quiet :heehee:

I was thinking along the line of the smaller shaft for ease of coupling to the DCBM, but looking at the spec for them I see they feature a 4 or 5mm shaft. So a bit of lathe work is needed whatever way.

John

[HiltonSteve]

I am watching this thread with great interest because building my own spindle and interfacing it with mach is something that I also would like to do.

The mechanics will not be a problem for me but designing electronic boards and putting them together has never been one of my strong points!

What I do have though is a selection of various good quality DC motor speed controllers that may be of use and would be happy to send one to you if it will help. Let me know the spec of the motor and I will see if I have anything that will be any good to you.

[John S]

What I do have though is a selection of various good quality DC motor speed controllers that may be of use and would be happy to send one to you if it will help. Let me know the spec of the motor and I will see if I have anything that will be any good to you.

Don't give him one of MY damn DC speed controllers..........:surprised:

.

[HiltonSteve]

Well I wasn't going to give him one of mine....:naughty:

You better add one of them to your 'u owe me' list as well.

[templecorran]

Now now boys, Calm down... no fighting.:nope:

I don't need one "of YOUR damn DC speed controllers".
I can make my own!

[HiltonSteve]

I don't need one "of YOUR damn DC speed controllers".
I can make my own!

Smart arse.......


But seriously, if you do want one they are four quadrant, digital speed controllers, switchable between 24-36v 200A max, speed control accepts 0-5v or 0-5ohm, forward and reverse, fully programmable acceleration and decel. All parameters changed by using 3 buttons on the front. Lots of either features that I won't go into. If you want a manual then I can email you one so you can have a look to see if there any good to you.

As long as you point me in the right direction for when I do my spindle electronics then you can have one for nothing.

And before John says anything, yes they are mine!

[templecorran]

This is off topic but I wanted to share this info with you all:
Our 2nd year Mechanical students are expected to enter "The Power Tools HotRod races" by taking a battery operated power tool and using it to provide the drive for a racing car.
The designs are many and various and often too fragile to race.
Having discussed with other staff over the past years, especially since Robot Wars was featured on the telly, what we could do to build an entry for the competition.
The Hot Rod challenge is not so hard, as all you need is a bit of light board, a motor and battery.

My friend found these motors:
http://www.greenweld.co.uk/acatalog/...ltage_347.html
and we put together a challenger for the race.

That's not the point of this post:
My point is that these motors exist, are very cheap, will pull the solid curd off rice pudding (bowl and all) and run fast.

However, I'm not so sure that in it's raw state without a reduction drive that it would be suitable for life as a spindle motor.
:feedback:

John