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Step & Direction

Successful Application: Metal bar feeder

Another successful application, and this time comes from the company Thelen Tech from Finland.

This company engineer is a big an of Delta and our step and direction solutions, and for this simple but effective solution they use 750W ASDA-B2 drive for the motion together with DVP28SV2 for the control.
And to monitor or configure speed, they add DOPB04 HMI.

Check the machine!
20130424_113924

Originally this was planned as full automatic system, plan was there is gripper
which would push material to cutting length, then saw it, then push more… and
whole it should be fast (over 30m/min speed)

20130424_113907

The cutting length can be adjusted using manually using hand-wheel, or automatic using HMI.
There is also possibility for closed loop feed back, but in these case feedback is taken from D1336 register

20130424_114203

Also +/-10V speed command is possible, motion control just calculates difference between real and wanted position and turns it PWM (or voltage).
This pretty nice arrangement for relative (like MPG) and absolute positioning using at the same time.

ParamOffset and accuracy Adjustment Screen

Diagnostics
Diagnostics Screen, very useful for the designer.

Openscreen
Monitoring screen

Thank you very much Thelen Tech to share this new machine with us!
Keep impressing us like that!

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!

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

Announcement: ASDA-A2 three-phase 400Vac

I know… The announcement comes a little late, because probably some of you already have some of those devices in your Labs and/or Office.

But before wait for this device for such a looong time, we’re glad to announce it, even If it’s late!

You can download the official announcement in the link below, but basically those are the features of that 400 Vac A2 drives:

1. Broad power range available from 750W to 7.5kW.
2. Input power supply of all ASDA-A2 400V series servo drives is AC 400V (380V~480V), 3-phase.
3. An incremental 20-bit (1280000 p/rev) optical encoder is equipped.
4. The motor inertia is divided into three types: Low inertia (J), Medium inertia (K) and
Medium-High inertia (L). There are 80mm, 130mm and 180mm three kinds of frame
sizes are available. The motor speed is from 1500 r/min to 5000 r/min and the torque
output is from 2.39 N-m to 119.36 N-m.
5. Built-in flexible position register control mode (PR mode) is offered. 35 kinds of homing
modes and 64 internal memorized position settings are available.

ASDA-A2 400V (0.75Kw-7.5Kw) Official release

On the other side, If you want to start ordering to your Delta provider, I recommend to take a look to the next Excel Ordering guide, very helpful to don’t make mistakes choosing the proper wiring

ASDA Ordering Guide

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

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