fast and accurate motion sim, AC or DC ?, which controller and h-bridge

There are faster speed 12v motors around, you would have to look at maybe an engineering place that does motors.
Motion dynamics in Australia does. See if there is such a place in Europe. There should be somewhere.

With 2500 rpm the speed is 208mm/s. Aren't the scn's also in the range of 200mm/s?
I can't find cheap ball screws with 10mm pitch. The holding force would increase with 10mm pitch, I don't know if that's important?

100-150mm loaded I think, but 200mm per second should do it. If you can increase holding force and torque, it will help overall.
@eaorobbie I think had a link for ball screws somewhere.

I meant that the motor would have to deliver more force to hold the position with higher pitch, I guess that's rather a disadvantage?
Here you can get cheap ball screws, the effective lenght is 190mm with this:
http://www.ebay.de/itm/1pcs-antibac...057?pt=LH_DefaultDomain_0&hash=item5650b77de9

You are right but there sadly there are no 1610 ball screws. There is a 2010 ballscrew but it's 5x more expensive. I will search a faster motor.

Ballscrews are limited @3000rpm
You need continiuos stalltorque with ballscrews to control the heat when stalling.
current limiting is also needed to stay safe.
google with SKEWED ROTOR DESIGN SERVO fore motors.
You need a higher voltage i think.
Roboteq makes a controller for that (there SDC series)cost a little more than a JRK

Hi @adgun
Good to have you back! That's a while!
Have you ever made your own ballscrew actuators and would you be able to share more of your findings?

hi value1
I Stil intent to make a actuator!
I have the needed machinery now.
I am starting a new job and begin saving again.
With the first money i wil start to know my machinery and the next step will be an actuator.
regards Ad

Thank you for the info adgun.
I know that I need stall-torque and that the nut is "rolling down" by itself without counterforce. A higher pitch even worsens this.
I tried to find some more infos about critical revs. The probelm seems to be the bending of the spindle which gets worse as the lenght of the spindle gets longer. I think a maximum 3000rpm which is 250mm/s would be ok and under load the 3000 rpm should be achieved rarely, if I would find such a motor.

Can simtools controll this roboteq controller? I still want to keep costs down and I find the jrk already expensive for a 3dof design.

I really have a problem to find strong dc motors and I'm confused with the specifications of the zyt90.
This is the only shop in Europe with still high shipping costs, which sells zyt90's but it only has 1500 rpm's @ 12V (and 3000rpm @ 24V) according to the product descirption:
http://www.motioncontrolproducts.co.uk/products/8/24/zyt90-155_12v_traction_motor_04_nm/
In the data sheet 4700rpms are named:
http://www.motioncontrolproducts.com/pdfs/pmdc_2.pdf
I tried to google for more infos but even other sources are not consistent with their infos. Here there are two types of zyt90 one with 4700 and one with 1900 rpm:
http://www.sqsk.cn/english/cpzx_3.htm

The only other strong DC motor I could find is a "my1020" but it's for 36V and with 12V the revs would be to low.

I searched different robotics and engeneering shops but they only have small and weak dc motors up to 120w. I could find some electric-scooter shops but the motors are always for 24V and 36V with not enough rpm at 12V

Hi
I looked at youre topic bether and think go wormgear.
You cant make an actuator fore les than a scn5.
Only stronger fore the same money.
Ask www.motioncontrolproducts.com fore there wormgears
Take a wormgear with smal redution,they are mechanicly bether for this and wil last far longer.
regards Ad

I have a lathe, mills and some raw-metall at work so the only thing that costs money is the ballscrew and linear guides. Each actuator would be around 60 Euro without motor. A worm-gear for a motor would cost around 30 Euro. I like the thought about having more travel path and hoepfully more accurate movement. The only thing is to find a matching payable motor for this.
I made a sketch, how I would like to build it:

In that way make youre actuator.
Look at the dc motor from www.stappenmotor.nl,this motor was sold bij www.inpulsecnc.nl without encoder fore 65,00 euro.
This could work with a jrk 28v3 at 26 volt
regards Ad

yes 3 amp cont. and 5 amp peak ,cool them like jrk 12v12
www.stappenmotor.nl www.inpulsecnc.nl
with this motor you can use 5 amps to stay in his cont. working area.
and will give 35 kg at 200mm/sec with 5 amps

www.impulsecnc.nl

Don't you mean the JRK 21V3? I can't find a JRP28V3 at the pololu website. Wouldn't this be a little bit weak as the output is under 100 Watts with this controller?
I can't find the Motor for 65 Euro but some other stepper motors on your posted website.
Don't stepper and servo motors need special controlling and hardware to run?
What does a controller need to be able to communicate with simtools and to controll motors?

I found this roboclaw controller on the pololu-website which supports up to 34V: http://www.pololu.com/product/2392
Could I use this one? Then I would have enough motors to choose.

you will be the first with a roboclaw,but there are people working with a sabertooth 2x25 and kangaroo
regards

The kangoroo sounds interesting and it seems to be also 12 bit. Is it possible to use another h-bridge with the kangoroo? I couldn't find informations about that.

Edit: I just went to the homepage of Dimension Engeneering and it looks like the Kangaroo is just an interface-board without any logic on it. So I guess that the controlling is done on the sabertooth.

Maybe I go the crazy way and build this: