Program Pulsing

For many anodizing processes, using a simple ramp and hold program to control the rectifier’s output is sufficient to yield and acceptable coating. In some cases, however, pulsing the rectifier’s output may have benefits in coating quality and reduction in processing times. Using Control It, you can quickly build very elaborate programs that include pulsing the rectifier’s output. This document will discuss building and using pulse profiles in a program. Please see Creating Programs for details about creating programs.

To use the pulsing capabilities, click the ‘Rectifiers’ tab from the main Control It screen, then select the ‘Programs’ icon to open the Program Manager. When the Program Manager opens, click to select a program to edit then select the ‘Edit Program’ option above the program list. To open the Pulsing Profiler, click the ‘Insert Pulse’ instruction option and select the ‘More…’ option to open the Pulsing Profiler form.  The Pulsing Profiler looks and works similarly to the program builder, but it uses percentages of output and ultimately will save time in program building if you use pulsing or voltage/current output change in a program.  Once the Pulsing Profiler form opens, you can create a new Pulse Profile, just click the Add Profile button  . 

Notice you should rename your pulse something that identifies it easily by selecting the ‘Rename” icon and naming the new pulse profile.  If a mistake is made in the naming it may not show up immediately after an edit, just exit out of the form and enter again and se if the change updated.  To delete a pulse profile, click to highlight and select the Remove Profile icon  above the Pulse Profile list. When a Pulse Profile is deleted or edited, none of the programs the profile has been used in prior to the change will be affected.

Then use the ramp and hold instructions following the prompts like this example:

Click the ‘Ramp’ icon, this form appears, enter the percentage you wish the output to change to.  You can pulse up, in which case you would enter a percentage greater than 100%, in this example we are using the pulse as a rest so the parts do not burn.

Once the output percent is typed in, enter or click on the ‘OK’ button, Control It will then ask how long you wish it to take to reach the target output.  Enter the value and click ‘OK.’

 

 

In this example we are now holding at this percentage for thirty seconds, entered in minutes, to let the parts “rest.”

We then wanted to return to the full percentage, the level that we started at, enter the value and select ‘OK.’

Anytime you use the ‘Ramp’ command, you will always be asked how long you wish the ramp to take.  Rectifier output can drop instantaneously, however when increasing output on a ramp instruction time may vary depending on your rectifier, make sure that you do not exceed the capabilities of your equipment.

Using the Pulse Profiler, you can create an instance of a single pulse using Ramp  and Hold  instructions just as you would when creating a program. Once the Pulse Profile is created you can then add it to a program multiple times to create a program to pulse the rectifier’s output.  Notice that all our instructions now appear in the form with a graph of what the program looks like.

When building a Pulse Profile, the values that define the ramp instruction output will be entered as percentages. When the pulse is added to a program the value of the ramp instruction is calculated as the percentage of the rectifier’s output just before the pulse instruction. Once a pulse profile is complete, exit out of the form and it will appear in the pull down list of pulses in the program editor.

For many anodizing processes, using a simple ramp and hold program to control the rectifier’s output is sufficient to yield and acceptable coating. In some cases, however, pulsing the rectifier’s output may have benefits in coating quality and reduction in processing times. Using Control-It, you can quickly build very elaborate programs that include pulsing the rectifier’s output. This document will discuss building and using pulse profiles in a program. Please see Creating Programs for details about creating programs.

To use the pulsing capabilities, click the Programs > Manage Programs menu item to open the Program Manager. When the Program Manager opens, double-click a program to open it in the Program Editor. To open the Pulsing Profiler, click the Pulse instruction and select More…

Using the Pulse Profiler, you can create an instance of a single pulse using Ramp  and Hold  instructions just as you would when creating a program. Once the Pulse Profile is created you can then add it to a program multiple times to create a program to pulse the rectifier’s output.

When building a Pulse Profile, the values that define the ramp instruction output will be entered as a percentage. When the pulse is added to a program the value of the ramp instruction is calculated as the percentage of the rectifier’s output just before the pulse instruction. For example, if the 20% Downside Pulse shown is added to a program directly after a ramp to 20 volts, the pulse instruction would hold the output at 20 volts for 2 minutes, step down to 4 volts (20% of 20 volts), then hold at 4 volts for 0.5 minutes before returning the output to 20 volts. To create a new Pulse Profile, click the Add Profile button  . After the new profile is created, you can rename it by selecting it and clicking the Rename button. To delete a profile, select it and click the Remove Profile button  above the Pulse Profile list. When a Pulse Profile is deleted or edited, none of the programs the profile has been added to will be affected.

Using the Pulse Profiles you can create elaborate and complex programs that control your rectifiers in a few easy steps.