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I have a few DC motor speed controllers lying around, some used and some new.
Mainly 24V DC - 125A - Forward, reverse, current limit adjustable, acceleration and de-acceleration adjustable, speed controlled by either a 0-5v signal or 0-5 ohm.
Also have a few 36V DC 160A boards, similar features to above.
If anyone is interested I can post more details, just let me know.
Are these fast enough to be servo amps or are they just for speed control?
OK, thinking about it probably the most suited ones i have are the following -
Four quadrant controller for PM DC motors - 200A
Mainly because they are fully programmable through the buttons and display on the front.
Datasheet is here - http://www.italseasrl.it/inglese/pdf/7CH4Q200.pdf
The 200A current limit can be adjusted down to whatever you need and they are switchable between 24V and 36V.
Well I paid £190 for them, how does half price sound? £95 for just the board or £100 with a matching 24V or 36V contactor.
Do you want me to pre wire the molex connector for the control wiring with a few flying leads on or do you want to fit it yourself? I have all the correct crimping tools for the pins that's all. Either way its included in the price.
Another option....
I am currently in the early stages of building a machine, need a few parts.....
Motor couplings
Stepper mounts (but i think John S is sorting these, seeing him tomorrow)
Bearing mounts for 16mm ballscrew
etc etc
What about a swap of some description????
I have sorted the driver boards out etc, getting them from Roy at DIYCNC and I have heard so many good things about him that I do not want to mess him around as he is making them up as we speak.
But the Z axis may be an option......
I already have some THK linear rail (20mm) and bearings, not got the screw yet as not happy with my Z axis design.
What do you have in mind???
This is what I am building..... bed size 1000 x 600, trying to get 130-150mm travel on z
http://www.mycncuk.com/forums/photop..._4_front_a.jpg
You can put that bloody fag out for a start.Quote:
Originally Posted by HiltonSteve
.
I already have reversed the rail on the Z after reading one of your previous posts!
The height of the gantry plate is 150mm plus the linear rail height which is 15.5mm top and bottom.
By the way, thats my Y axis, X is the longer travel on the bed, please lets not get into that argument again....!:confused:
Kip,
Had another thought.... as well as looking at the z axis I will need my two gantry side frames cutting, approx size at this stage which looks like it is not going to change is starting from a cut piece which is 500mm x 300mm x 20mm Aluminium. Once I have seen John S then I can finish putting all of the holes in the design which I would need putting into the frames also.
How many of these controllers did you say you wanted...!!!
If I had a choice out of the Z axis or side frames I would say make me the side frames. But really I dont want a choice, would be good if you could do both and I am sure we can come to some arrangement.!