DIY CNC Motor Upgrade

[@captcarlos]

I'm quickly marching through your back catalog. Well done. This one for example. So simply presented the kernel of it. Thank you.

[@JBWorx]

Thank you for the comment Carl I am glad that you enjoyed it!

[@SnoValleyGuy]

THANK YOU for this video - this is one of the most useful videos on steppers vs. servos that I have seen on KZbin!! I have used Stepperonline NEMA23 steppers in several projects and really like them. I'm now ready to jump into the world of servo motors. Is there any chance you'd do some video tutorials for tuning the Stepperonline servos? Thanks!

[@JBWorx]

Thank you for your positive comment. I like the Stepperonline Servos as well. Unfortunately there is very little interest in this topic and besides you and me nobody would watch my video lol 😂. However the tuning is really not all that different or difficult from the JMC servos.

[@saeedkamali2032]

thanks for your sharing. good to hear what we must choose in our diy cnc projects.

[@JBWorx]

Good if this was useful to you.

[@Todestelzer]

I didn’t wanted to deal with the servo calibration. Bought closed loop steppers from JMC. 48V 3Nm. Bought a Sorotec compact line 0404 this week. Now I have to wait 2 weeks till it’s ready for pick up 😂

[@JBWorx]

It’s actually not that bad, even as a beginner. That is a nice machine ! Congrats and have fun.

[@adrianharrison5208]

I have been going through your videos and I really like the information I am getting from you. I bought some servos for a small CNC I have been building but the tuning really puts me off adding them, have you done a video tuning a servo?

[@JBWorx]

I am glad that you like it. Yes there are 2 videos to that topic. JMC Servo Motor Tuning kzbin.info/www/bejne/lWq0Xol8mtihd5I

[@jimlahey5354]

Loving these videos. Nice job 👍

[@JBWorx]

Thank you so much Jim.

[@jamessoutar4354]

Great info. I learned a few new things. Thanks.

[@JBWorx]

Excellent that it was helpful !

[@nickthelebo]

First i would like to say your videos are awesome super informative and thaught out some of the best information on youtube ... i think you need to add some more tags to your videos tho because they never show up when im serching hobby cnc topics its allways that Roger clown .... secondly what was the reason you ended up goin with the jmc servos over the stepper online servos ... and 3rd thing would you do a full rundown series on your machine . Ballscrews servos motion controll what your useing and why i think you would have alot of usefull information to share ... keep it up love your content

[@JBWorx]

Thank you for your feedback that is very motivating KZbin has a mind of its own at leased for my videos it’s difficult to get my view count up. Lately I ask for a like and that seems to help quite a bit. I might have to go back to older videos and add some more tags … thx for the input. So I had the JMC servos first but then ended up making an exchange for a customer of mine and bought the Stepperonline servos. I think after years of use I can say I like the Stepperonline servos better the only problem is you cannot get one with a break for the z-axis. They are available as a separate add on however from other vendors. PS: Roger shows up for me as well … lol 😂

[@andysworkbench]

very well explained thank you very much

[@JBWorx]

Thank you!! I know it was rather dry content but I am glad if it helps. The next video will be about servo tuning.

[@andrew-ms4de]

Hello are you going to compare the JMC and the stepperonline version ? I think this would be very interesting

[@JBWorx]

Thank you for your comment Andrew. I run both of these motors and I think they are very close. I prefer the Stepper online servo. If you check the tuning video you see that I frequently change the oscilloscope resolution for the JMC motor. The Stepper online software does that automatically and that is really not an advantage as you often have to guess how many increments it is showing. However I think the motor driver is better. I probably will not make a comparison video as there is not much interest in that subject. I would only have 2 views … you and me lol 😆.

[@andrew-ms4de]

@@JBWorx are you using the 180 watt Stepper online servo on you router? I was going to use 4nm closed loop steppers until I saw your video, Clough42 show the servo but it seems to be very easy to move have you had any problems? Thanks keep up the good work. Andrew

[@JBWorx]

I have build a much larger / heavier machine with 180W servos and the performance is great. Accurate and fast just fun to watch it move. I saw the video you are referring to and you have to give it a bit more effort to tune the axis than what he did. It can be difficult as a beginner hence my video as a help to get started.

[@andrew-ms4de]

@@JBWorx are you going to show the stepper online servo tuning? the stepper online version is much easier to get in the UK and as you know their is very little info on them. Thanks

[@JBWorx]

I am not sure yet. One note for the tuning is that the resolver of the OMP Servo is better and has more increments. So the same angular displacement on the motor shaft (or same following error for a position in mm on your axis) will result in a much higher increment count on the oscilloscope. So one would think dang I cannot get the tuning good when in reality it is already much better than on the JMC servo. I hope my explanation is not confusing.

[@kuna4200]

Can you make a video about tuning the stepperonline servo? I can‘t find anything on youtube and i would like my cnc to come alive😅

[@JBWorx]

I plan on updating one of my servos to a 400W Stepperonline however this will take a while as I am currently using my machine to make the fogbuster and some other projects. I would give it a go and just read through the instructions the map to follow is the same as for the JMC Servo. I found the software easier to use.

[@kuna4200]

@ I've been trying for a week now and I can't get the position error below 500 or so. There are no useful instructions for these servos anywhere and I'm about to give up. Maybe i try again in the future

[@JBWorx]

Actually 500 is really good the scale is not the same as the JMC Servos. The increments on the resolver on the motor are much higher on OMP so my suggestion is take a dial indicator set onto the axis now move the ball screw until you see about 500 or so increments look at the movement on the indicator. I bet it will be in spec for what you are looking for.

[@mrechbreger]

Thank you for your video, which power supply do you use for the integrated Nema23 Motors? Do you take care about the back-emf with a brake chopper? I noticed deceleration is inducing power and taking out the 36/48V motor easily.

[@JBWorx]

I use a single 48V no name power supply. I have not had any issues on several machines when the motor decelerates (generator mode). However I think the problem becomes more noticeable once you start to dedicate the power supply per a single axis.

[@mrechbreger]

@@JBWorx I'm trying to max out the speed on my machine. If I don't then everything's fine (on a DIY CNC you usually don't go that high speed). However since you have such a machine -- would it be possible to run a speed test to show how far you can go? Just slowly step up to see when / if you also experience that issue? max velocity is actually not such a big topic - acceleration is and for the PSU deceleration when the motor induces the voltage back onto the line. I'm looking into chopper circuits and plan to implement one within the next 1-2 weeks.

[@JBWorx]

I know from experience that Meanwell PSU’s don’t like much feedback current and fault easily. I know that I cannot make mine fault out on the size of my machine and I have dual y - axis motors. So max speed and a hard acceleration (sorry don’t remember the values I used) did not make the PSU fault. However I had a problem with servo drives faulting out on too high acceleration and during deceleration. I reduced the acceleration values until the problem stopped.

[@mrechbreger]

​@@JBWorx I'm using Meanwell PSUs here, Y is also supposed to be dual axis (prepared but not installed as dual motors since the single side seems to be okay so far, X single axis (for testing I use the X axis). Yes slowing things down is okay, but I want to go for the maximum possible speed here. Ok thank you for sharing your experience! Viele Grüße aus Taiwan.

[@JBWorx]

Bu keqi

[@MikkoKui]

Hi, which kind of power cable you prefer for JMC motors, shielded or non-shielded (DC line)?

[@JBWorx]

I use shielded wires ONLY ! Even for the limit switches

[@javierdelgado6400]

Zac

[@JBWorx]

Thx