Upgrading from stepper to servo... how?

bluecuriosity
Posts: 9
Joined: Wed Sep 30, 2015 11:19 pm

Upgrading from stepper to servo... how?

Postby bluecuriosity » Wed Jun 08, 2016 5:18 pm

Are there any servo direct replacements for the nema 23 stepper that comes packaged in the China lasers?

Are there drawbacks to a servo run XY gantry vs stepper (other than cost)?

I would like more repeat ability granted from encoder feedback as well as an improved laser cut quality when handling acrylics. Anything else I might need to know before setting myself down this road?

pista01
Posts: 5
Joined: Wed Apr 06, 2016 4:29 pm

Re: Upgrading from stepper to servo... how?

Postby pista01 » Thu Jun 09, 2016 7:26 am

One possible direct replacement is the ClearPath SK motors.

https://www.teknic.com/products/clearpa ... th_sd_info


I've not used them yet, but I will be using them in my scratch built laser cutter. The motor replaces the stepper and stepper driver, taking the step and dir feeds from the DSP.

thejuggernaut
Posts: 91
Joined: Fri Sep 27, 2013 11:08 pm

Re: Upgrading from stepper to servo... how?

Postby thejuggernaut » Mon Feb 20, 2017 6:53 pm

Just ordered one of these for another project. They look amazing! They can even be setup to use hard limits. You don't even need switches, and they look amazing accurate.

https://www.youtube.com/watch?v=ZRURwDFvdAs

Watch this video and you'll never want to run anything else.

Techgraphix
Posts: 475
Joined: Fri Jan 20, 2012 1:39 pm
Location: Appelscha, the Netherlands
Contact:

Re: Upgrading from stepper to servo... how?

Postby Techgraphix » Wed Feb 22, 2017 1:24 pm

The Leadshine 2NM Nema23 Hybrid Servo Closed Loop Stepper Motor 573HBM20-1000+HBS507 perform very well too.. I build several machines with them and i'm very happy with the results.
Despite the high expectations of those Clearpath servo's they could not convince me in practice.. quite overpriced too..IMHO

Kees

thejuggernaut
Posts: 91
Joined: Fri Sep 27, 2013 11:08 pm

Re: Upgrading from stepper to servo... how?

Postby thejuggernaut » Thu Feb 23, 2017 6:41 pm

Techgraphix wrote:The Leadshine 2NM Nema23 Hybrid Servo Closed Loop Stepper Motor 573HBM20-1000+HBS507 perform very well too.. I build several machines with them and i'm very happy with the results.
Despite the high expectations of those Clearpath servo's they could not convince me in practice.. quite overpriced too..IMHO

Kees


What was it about them that you didn't like besides the price? I am curious, because we were about to start using them on another project.

Techgraphix
Posts: 475
Joined: Fri Jan 20, 2012 1:39 pm
Location: Appelscha, the Netherlands
Contact:

Re: Upgrading from stepper to servo... how?

Postby Techgraphix » Fri Feb 24, 2017 1:27 pm

They ran smooth but i expected much more power and speed compared to my standard steppers.. They perfomed only just a little bit better IMHO..
With the Hybridsteppers from Leadshine + drivers, i had a much bigger improvement for less than half the price..

Another thing is that i live in Europe and stuff from the UnUnited States of America is sent with rediculous shippingcosts which makes goods even more expensive.. Above that i have to pay upto 40% over goods and shipping PLUS a certain (high) amount of importtaxes and handling..
This makes the Chinese market very interesting...
Kees

SWMS
Posts: 158
Joined: Mon Jan 06, 2014 4:28 am

Re: Upgrading from stepper to servo... how?

Postby SWMS » Thu Mar 30, 2017 10:31 pm

Hey Kees, since we are in Europe ( Don't get me started on the other half of my country voting out of the EU :roll: ) and you building machines. Do you mind if I PM you? You sound like you might know of some useful suppliers etc.


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