Search

Delta Industrial Automation

Tips & Tricks

Open Search
Tag

Motion Control

Succesful Application: DVP20PM + DOPB-PS and G-Code download feature

Today, were going to talk about motion control.
There´s a PLC not released in many countries, but capable to manage up to 3 axis using step and direction control, is called DVP20PM or PM series.

20070817-20PM

This PLC needs special software called PMSoft, available on the web for free, as always.
This software a part from be able to program DVP20PM, it have the capability to work with G-Code files

PM-Soft Software

The G-Code files are a codified files that transform a Autocad file into a motion control trajectories, making the programming of motion control systems really easy.
Thanks to that codification, you can cut a difficult wood profile for example, designed previously using Autocad, and avoiding the hard PLC programming work to the engineer.

The problem that customer use to have with DVP20PM is when customer want to change the cutting profile of their product, because in that occasions, the Computer is needed, and not always our customer have a computer on the machine, isn’t it!

G-Code DVP20PM Download

Here, is where appears our new DOP-PS models, already available in EMEA region.
With this HMI´s your customer have the capability to change the G-Code profile only with one USB disk, following the next process:
1. Create Autocad File
2. Transform to G-Code and copy to USB disk
3. Connect the USB Disk to the DOPB-PS and download it to the 20PM
4. Run the program!

According to that, our HMI team prepares for us the complete following example where we´re going to cut an Scorpion picture profile into our 20PM.

You can download the HMI and PLC programs, and a nice pdf detailed explanation of how they create this application in our FTP Delta application guide folder

DVP20PM + DOPB-PS and G-Code download feature example

As you should understand this really simple kind of CNC tool could be applied to many kind of applications, from Wood cutting, plasma, or gluing, to stone grinding or even metal cutting!
Don´t hesitate to share your experiences with us.

And really soon same functionality to DVP10MC the future CANopen motion controller from Delta!

28

Motion Control: Pick & Place (2 axis interpolation)

One of the most typical applications once you have some interpolation device in your hands is Pick & Place.
The objectie of the application is move some object from one point to another one, and you can´t find one single company that didn´t need in some way one variable of this application.

Of course application have multiple variables, and the most easy one is with linear movements.
Simple movements Pick & Place

But later engineers think how to save time with that process to make their machines faster.
And the easy way is to interpolate both axis following a semicircle as below.
Two axis interpolation

Because of the popularity of Pick & Place, in Delta we have several devices able to work like that. Further more our ASDA-A2 servodrive is able to do it by his own, with no extra PLC or motion controller.

But today I would like to share how to do that application with one of our standard CPU´s and ASDA-B servodrive controlled trough Step & Direction.
So in this case you can use the same program to control Servo systems, Steppers or even inverters.
The CPU´s able to interpolate two axis nowadays in Delta are: DVP-SA2, DVP-SX2 and DVP-SV.

Regarding the application, you can found how to connect the hardware in the following old post
Motion Control: HMI – PLC – B series Servo (1 axis movements)

And Regarding the Software, the keypoint is the DCIMA instruction.
check the following program
Pick & Place Example

And If you are still not fully convinced to use our PLC´s for Pick & Place.
Here is some video example of our system working!
Is not exactly a pick & place application, but uses the same instruction.

And don´t hesitate to Let us know about your experiences with Pick & Place

11

How to control Delta AC drive using Step & Direction

There are three basic ways to control a AC drive:
– Torque control (analog signal, digital signal, embedded potentiometer, communication)
– Speed Control (analog signal, digital signal, embedded potentiometer, communication)
– Position Control (Step&Direction, Comunication)

But because the inverters accuracy (usually) is not very good, the engineers, prefer to use Steppers, or Servosystems.
So the majority of the inverter applications used to be Speed or Torque control.

But the last years, in the industry appears the need to realize good positioning with middle power and reliable cost. Servo drives are still too expensive for middle power and steppers are only for low power applications.

Because of that, the new C2000 surprise us again, with the capability to have accurate positioning using Step & Direction control.
The way to achieve the good accuracy, is because some feedback encoder located on the motor and the EMC-PG01L card, to acquire the feedback and position command at the same time.

If you wolud like to set up this system in your factory, or for your customers, check the following tutorial presentation from Mr. Robert Lo.

C2000 Step & Direction

name: den-eindhoven
Password: BuPd2175

5

High Speed Inputs – Outputs in new Delta PLC S2 series

One of the most used features of our new S2 series are the high speed Inputs and Outputs.
The manual and brochures, have all the information here related, but we like to compile it for fast reference.

To control a Delta Servo drive trough step and direction (or a stepper motor, inverter…) those are the speed limitations of our new PLC’s


Click on the picture for bigger size

On the other side, If you need to measure a distance with Encoder, or just counting the number of pieces, then you must check first what are the max speed allowed for our CPU’s


Click on the picture for bigger size

But If you are going to made the program, this sheet with the proper Counter name, and their limitations, It would be really useful.


Click on the picture for bigger size

If you prefer to save all this information in your computer download the next Excel file

18

Motion Control: HMI – PLC – B series Servo (1 axis movements)

There are several ways to control one axis.
But If you need to control position (no speed or torque), the Step & direction way is normally the simplest and cheapest way.
The other advantage is that you don’t have to rack one’s brains thinking if that protocol is going to work or not, Step & direction is universal.

So our intention in this post, is show you the Delta PLC tools to control one axis trough step and direction:

Hardware:
As always the first is how to connect everything.
To communicate PLC and HMI you can check the HMI – 3 PLC Communication Example.
And to know how to connect the B series servodrive with out CPU, just follow the next Schem. (click on the picture to see it bigger)

Configuration:
Basically the configuration of the servo consist in match the servo inputs of the diagram with the internal configuration, but for better comprehension please check this video
Or simply download the configuration file Step & Direction

Software:
Once the hardware and configuration are finished, then you only need to download the following examples of HMI and PLC programs.
In this examples we use three kind of movements:

Relative Movement (DDRVI): We can move our servo some distance without saving any reference. (very useful for moving trays)
Absolute Movement (DDRVA): We can move our servo some distance always having reference where the home is (very useful for linear positioning applications)
Speed Movement (SPD): To mantain the servo in a constant speed. (useful on material handling applications)

One Axis Movements

All the Delta servo drives (and some inverters) have the possibility to manage them trough Step & Direction

Updated: Extended features for DDRVI and DDRVA instructions on the latest firmware versions.
Check the next link

3

Hannover Messe A2 motion demos 1

As many of you, the last week we have been attending the Hannover Messe. Presenting all the new products that we already presented on this blog. (and many more…)

One of the most interesting things of the Delta IABU stand were the Motion Demos comming from Taiwan.
There were 3, and for the people who can’t visit us these days we will show you a video of all of them.
Today we’ll start with a Demo who shows us how A2 solve the problem of the Cut on the fly applications.

The demo is presented by a good friend of us, Mr. Winex Yang, our Taiwanese expert in Delta Electronics Motion systems.

0

Blog at WordPress.com.

Up ↑