On this page you will find helpful tips on how to increase production with the following systems
   Upgrades for : Stetson Ross - Newman - Coastal - Yates - Gilbert - USNR  
Maximizing Production
Bed rolls, Tensioning, Positioning, Hydraulic planer drives, Automating the planer
Shear, Bed rolls, Pineapples,Tensioning
Positioning, Hydraulic drives, Automating the feed table
In the majority of mills it is the feed table that needs a lot of attention. It is often the weak link in the system.  In order to increase production and uptime, the feed table must operate at maximum efficiency and be very consistent.  By increasing the efficiency and precision control of the feed table, speeds can be lowered to within 3% of planer speed, providing  better control of the lumber - eliminating many issues caused by forcing pieces through the planer with the feed table.  
Maximizing Planer Output
The area that makes a significant difference in the productivity of your planer is the tensioning of the feed rolls, positioning of the feed rolls, and the system that drives the feed rolls. Each one of these components must work together as one complete system. If one component is not set up right or working correctly, it disrupts the process and shocks the system, resulting in much wear and less-than-acceptable performance.
Maximizing Feed Table Efficiency
.
Tensioning 
&
 Positioning Kits
Improve the performance of your planer
New Planer Kits
FEED TABLE
PLANER
A pineapple  designed to Perform ! 
Specialists in planing mill performance Improvements
Cobra Technical Services
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Overhead Tensioning
&
Positioning Kits

Newman,Coastal,Stetson Ross,Woods, and more
Improve the performance of your planer
(541) 915-8323
New Planer Kits

 Did You Know?
.05 of a second hesitation at a feed table with speeds of 2000ft/min = 12,852bdft/hrLoss in 
Production
Over 40 years 
experience with

Hydraulic Planer Drive 
Systems
Cobra Technical Services
Specialists in planing mill performance Improvements.
Making older feed table
run like new
Specialists in planing mill performance Improvement
It only takes one to see a difference!
Cobra Technical Services
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Newman, Coastal, Stetson Ross, Woods, and more
Planer Feed Roll
for 
Newman, Coastal,
Yates, Stetson Ross, Gilbert,Woods
New Planer Rolls
Cobra Technical Services
Did You Know?
The Difference between 75% uptime and 95% uptime
with 10ft boards at
2000ft/min is over 164,563 bdft
loss in
production a day
Specialists in planing mill performance Improvements
It only takes one to see a difference!
Cobra Technical Services
Click here to add text.
Newman, Coastal, Stetson Ross, Woods, and more
Cobra Technical Services
Click here to add text.

Overhead Tensioning
&
Positioning Kits

Newman,Coastal,Stetson Ross,Woods, and more
Improve the performance of your planer
New Planer Kits
A pineapple  designed to Perform ! 
The Cobra Pineapple
Specialists in planing mill performance Improvement
It's about Efficiency!
Cobra Technical Services
Over 40 years 
experience with

Hydraulic Drive 
Systems
Cobra Technical Services
Specialists in planing mill performance Improvemens

 Did You Know?
.05 of a second hesitation at a feed table with speeds of 2000ft/min = 12,852bdft/hrLoss in 
Production
Did You Know?
The Difference between 75% uptime and 95% uptime
with 10ft boards at
2000ft/min is over 164,563 bdft
loss in
production a day
     Cobra Technical Services are specialists in high speed  planers and feed tables including: Newman, Stetson Ross, Coastal, Yates, Gilbert and Woods.  We have an extensive experience with improving the performance in planer tensioning and positioning, automatic tensioning positioning systems, planer hydraulic or electric drives, Top head side head servo positioning systems, feed table hydraulic or electric drives, and feed table tensioning systems . If  you are interested in improving the performance of your equipment give us a call! We hope you find this website information valuable, and we ask for your suggestions to help make this site even more valuable.

     Cobra Technical Services are specialists in high speed  planers and feed tables including: Newman, Stetson Ross, Coastal, Yates, Gilbert and Woods.  We have aextensive experience with improving the performance in planer tensioning and positioning, automatic tensioning positioning systems, planer hydraulic or electric drives, Top head side head servo positioning systems, feed table hydraulic or electric drives, and feed table tensioning systems . If  you are interested in improving the performance of your equipment give us a call! We hope you find this website information valuable, and we ask for your suggestions to help make this site even more valuable.

Cobra Technical Services LLC 
435 HAZEL COURT, EUGENE, OR  97401
(541) 915-8323   FAX (541) 484-7507    
E-mail bjenson@cobratechservices.com

   Upgrades for : Stetson Ross - Newman - Coastal - Yates - Gilbert - USNR  
The Shear 

The shear, table and rolls have to work together to obtain a smooth flow of product into the planer. Our experience shows that transfer chains must deliver the lumber to the proper place at the beginning of the spiral bed rolls, allowing the lumber to use all the bed roll.  This insures that the lumber is driven to the shear.  Of course, it is critical to have a solid ribbon of wood to the shear, and we have several new backlog control schemes available to help this as well.  This helps the lumber feed smoother on the feed table and from the nose of shear to the fence. The angle of shear needs to be adjustable for wide and narrow products. Many people feel they need a powered shear, to help feed lumber to the table but In most cases they don't.  It is usually because the efficiency is very poor at other areas of the feed table. The first step would be to make sure the feed table is running at peak performance. If  necessary, get a specialist in to take a look at it. At the high speeds feed tables run others may miss what the specialists at Cobra Technical Services will see.The best candidate for powered shears are mills who run green lumber or long lengths. When using a powered shear, it must be at 90 degrees of the table and run at a speed that insures the boards get over to and under the pineapple quickly.  When using a Cobra powered shear you can chose either electric or hydraulic. Usually hydraulic is less expensive if the mill has hydraulic fluid close by. 
Bed Rolls

The lead of the bed roll should be one that works best for the individual mill.  All bed rolls need to be the same diameter.  They should be level with each other and set at the same degree angle.  Although this may seem very basic, it is a common problem in most mills.  Cobra has used high speed cameras to study different bed rolls and pineapples.  It was concluded that knurls on bed rolls act as brakes, and only slow down the entire system. The first step is to turn the bedroll around so that the spiral continues all the way to the fence. It is also important to replace the bed roll early due to consistent wear.  Cobra can insure that you have the right designed lead and surfaced rolls for your individual mill. See the design thats making a difference and click here
  

Pineapples

The best pineapple to use is one specifically designed for the type of lumber and system in your mill. One of the reasons the Cobra design works so well is the smooth transition from the lead to the knurl. Having this very smooth transition from the lead to the knurl makes the transition of the boards from the pineapple to the guide smooth, which gives you the ability to make things repeatable. One of the most important parts of increasing the production and uptime with the feed table is just that, MAKING IT REPEATABLE.  The pineapple and bed rolls need to have the same spiral and lead. Imagine a national fine thread and a national course thread on a bolt. With one turn, each one travels different distances. The last thing we need is something working against you from the start.  The Cobra design has improved production by 18% with some customers who did nothing else but install the new bed rolls and pineapples. Cobra Bed Rolls and Pineapples are the best in the industry, are made to fit any feed table, and are being used through out the US and Canada.

       

Tensioning

Most systems are out of adjustment or never worked right due to the design. By knowing which feed table you have, we can tell very easy if this might be a problem for you. You can check some of this out yourself by watching the feed table run. Look for the pineapple losing contact with the board. Check the resistance of the pineapple by taking a 4ft 2x4 and prying up.  You should be able to move the pineapple up and down with little strain and have no difference in the resistance between all the way up and all the way down. In most cases it is either too heavy, too loose, or increases in pressure or weight the higher you go. The ideal is a counter balance effect; the pineapple should have a lifting motion as opposed to the board pushing the pineapple up. Whether the pineapple is up 2 inches or 6 inches, it needs to maintain the same pressure. Most mills run a variety of lumber from pine, fur to cedar, green and dry. In order to increase uptime and increase production you must have the ability to change the counterbalance pressure and to fine tune it for the specific product you are running. With the Cobra system this can be accomplished manually or automatically through the PLC. To learn more about this counterbalance feed table system and why it will improve your uptime. Please email us or give us a call.


Position 

Positioning of the pineapple and short stock rolls needs to be correct. Much of the time they are set too low which creates a unnecessary travel distance and decreases the ability to feed lumber at a repeatable rate. Being set too low causes the boards to hesitate on their way to the guide. The end result is loss time, efficiency and overall throughout. Our positioning systems operates each pineapple individually at speeds operators can achieve a position within an 1/8 or less, so they run gently on the boards not needing to climb or be forced up.


Hydraulic Drives

Throughout the years Cobra has applied just about every type of hydraulic motor. Many brands and different series of motors have gotten a bad reputation; not due to their design but by being misapplied from the start.  This is a crucial area that must be carefully evaluated on a feed table and maintained in a certain manner to keep up production after any improvements are made.  Identify what motors are being used on your system.  Find the hydraulic schematics if possible and check out how they are being run in series. Make note of any changes. The same things need to known about the HPU. Many of the Hydrostatic Transmission Pumps on these drive systems are older models and are hard to keep in sync or to keep at a consistent speed. Instead of purchasing new pumps (which can be very expensive) Cobra has new electrical pump control devices and driver cards which make your current system run like new. Reducing the amount of components in the system will also increase the efficacy of a hydraulic drive.  It is amazing the amount of components that can be discarded when the system is designed right.  Do you have a flow divider in your system? It is not necessary.  This, along with many other components, just creates heat; causing inefficiencies and maintenance nightmares. These systems are famous for running too hot. If this is a problem in your mill, Cobra can get this under control with a few helpful suggestions. 


Note:
I was making some sales calls by phone in 2008 and came across a mill who I didn't’t know at the time had our feed table system.  I was in the process of giving him my sales speech he interrupted me and explained they already have the best feed table around.  I was disappointed, but after talking a bit we both realized we were talking about the same feed table.  It happened to be a mill that Cobra did work for many years ago. 

The Tensioning 

When it comes to the tensioning of the feed rolls, the ideal is a LOW BUT CONSTANT tension that keeps the boards traveling smoothly without slipping or hesitating. The tensioning on many planers causes the rolls to have varying tension based on the thickness of each piece of lumber.  This works well when all the lumber is similar in thickness. In a normal run of lumber, however, thickness variation causes the rolls to "hammer themselves", leading to a premature failure. The planer operator has to constantly try to balance the tension settings based on how the lumber is running, or continue running all lumber with the same settings.  This creates wear and tear on the bearings, rolls, shafts, and results in less than optimum performance.  When variations exceed 1/8 inch or more the lumber will at times hesitate in the planer and cause break ups requiring the planer operator to stop production. The Cobra system provides constant tension, even with high variations in lumber thickness, using specially designed cylinders, accumulators, and adjustable pressure controls. The Cobra tensioning system takes the harsh “banging” out of the operation and makes the whole system much smoother.  The result - better production, fewer breakups in the planer and longer service life on the machine.
 

The Positioning 

The positioning aspect of the planer feed roll system allows the setup man to individually position the top feed rolls based on thickness of lumber. We remount these cylinders to a position where the angle of the cylinders gives the planerman a better ability to fine tune these positions accurately, within a 1/8 of an inch.  This system replaces the current electric motors and gear boxes along with many older hydraulic positioning components. If the rolls are not set correctly, it will be putting the planer through much abuse with enormous wear to sleeves, bearings, and shafts. This also results in a loss of the tolerances needed to achieve maximum production. Cobra's automatic positioning system takes all this to another level. 
 

Feed Drives

AC or DC drives work great, and we do recommend these when appropriate, however they are not always affordable for the typical mill. Through the years Cobra Tech Inc. has successfully applied many high efficiency hydraulic motors on planers and feed tables. We are able to apply this knowledge and choose the motors that will work best on your specific planer drives.  Unless your planer runs at speeds slower than 800 FPM, we generally recommend hydraulic drives.  

If your planer meets the requirements for using hydraulic drives we at Cobra Technical Services LLC can provide the system which will meet and exceed your needs, whether a new system or revamping an older one.  In most cases if the mill has an older electric drive, a conversion to hydraulic is much more affordable than a VDF drive system.   If you already have hydraulic drives, it is also less expensive to stay with a hydraulic drive because you already have a power unit and other components that can be reused. Revamping an older hydraulic drive carries many of its own considerations.  Is the pump a variable displacement Hydrostatic Pump?  Does it meet the displacement requirement for the speeds you plan on running?  What type of pump controller and other devices drive the pump? What type of hydraulic motors are you currently using and how are they mounted?  Are the motors run in series, if so how? And, of course, the filtration and cooling systems must be taken into account.  

If the pump is in good running condition the next crucial component of the pump is the controller.  There have been great advances when it comes to pump controllers and the devices which drive and control them.  The controllers we use are adaptable to many of the older pumps, like Sundstrand, Eaton, and Denison. If the pump meets specs, there is no reason to purchase a new one.

Of course, just like the pump, the motors need to be the correct displacement.  The motor also needs to be one engineered for this application. Many motors have been misapplied on drives, mounted wrong, or run ineffectively in a series, all of which has given hydraulic drives a bad name.  Installed correctly, however, motors can produce great results and last a long time.  When it comes to the motors, Cobra uses only one type. It is a highly efficient motor which has been proven to the industry to be the best. 

The shaft size of the feed rolls also plays a roll when it comes to our motor drives.  Cobra uses a special b-lock coupling and mounts the motor directly to the shaft of the feed roll, therefore making it torque arm mounted. This gives the motors the ability to have the movement needed to insure a long life. This can also allow you to get rid of many other components, and really cleans up the planer.

Cobra Technical Services will survey your existing system and provide you with our recommendations for the most cost effective solution for your planer mill upgrade.
 

Automatic Tensioning and Positioning Systems

One of the final stages to increasing the uptime and production is automating these systems. This achieves independent positioning of each roll to a predetermined set point with a touch of a button. The tensioning pressure is established the same way. What is great about these systems is the PLC's ability to memorize the settings for each product.  Once you have determined the best parameters to get the smoothest operation and maximum production for each product, information is stored into the PLC and available at the push of a button when that product is being run the next time.  This helps to minimize setup time and reduces variations in productivity.  Automatic tensioning and positioning systems save time; whether setting up before production or during production. Imagine, after any manual change to the position or tension pressure due to a break up or some other reason, all rolls and pressures go right back to original set points. This automatically saves time and insures that the planer is set to achieve maximum productivity.

There are a two types of tensioning controls in the industry; a closed loop servo system with digital controls or a closed loop system with analog controls.  We have experience with both types.  We almost always recommend the analog system because it is easier to adjust, and much more forgiving if things get out of adjustment.  The bottom line is BETTER PERFORMANCE AND MORE UPTIME.  
New Stetson Ross
Feed Table Stands
A pineapple  designed to Perform ! 
The Cobra Pineapple
Specialists in planing mill performance Improvement
It's about Efficiency!
Cobra Technical Services
.
Tensioning 
&
 Positioning Kits
Improve the performance of your planer
New Planer Kits
Planer Feed Roll
for 
Newman, Coastal,
Yates, Stetson Ross, Gilbert,Woods
New Planer Rolls
Stetson Ross Planers
Bringing a New Dimension of Performance to Planer Mills
Coastal Planers
Gilbert Planers
Yates Planers
Woods Planers
Newman Planers 
Stetson  Feedtables
Feed-Table Upgrades
for used planer  equipment with the Newest Technology
Coastal Feedtables
Gilbert Feedtables
Yates Feedtables
Woods Feedtables
Newman Feedtables
Feed Rolls for Coastal Planers
Upgrade your used
Coastal Planer
&
Coastal / USNR Feedtable 
Pineapples for Coastal Feed-Tables
Used Coastal Planers
feedtables and Parts
Feed Table Bed Rolls for Coastal Planers
Troubleshooting the Coastal Planer
Drives for Coastal Planers 
Feed Rolls for Newman Planers
Upgrade your used
Newman Planer
&
Newman Feedtable 
Pineapples for Newman Feed-Tables
Used  Newman 
Planers & Parts
Feed Table Bed Rolls for Newman Planers
Troubleshooting the Newman Planer
Drives for Newman Planers 
Feed Rolls for Woods Planers
Upgrade your used
Woods Planer
&
Woods
 Feedtable 
Pineapples for Woods Feed-Tables
Used Woods Planers
feedtables and Parts
Feed Table Bed Rolls for Woods Planers
Troubleshooting the Woods Planer
Drives for Woods Planers 
Feed Rolls for Yates Planers
Upgrade your used
Yates Planer
&
Yates 
 Feedtable 
Pineapples for Yates Feed-Tables
Used Yates Planers
feedtables and Parts
Feed Table Bed Rolls for Yates Planers
Troubleshooting the  Yates Planer
Drives for Yates Planers 
Feed Rolls for Stetson Ross Planers
Upgrade your used
Stetson  Planer
&
Steson Ross Feedtable 
Pineapples for Stetson Feed-Tables
Used Stetson Planers
feedtables and Parts
Feed Table Bed Rolls for Stetson Planers
Troubleshooting the Stetson Planer
Drives for Stetson Ross Planers 
Feed Rolls for Coastal Planers
Upgrade your used
Coastal Planer
&
Coastal / USNR Feedtable 
Pineapples for Coastal Feed-Tables
Used Coastal Planers
feedtables and Parts
Feed Table Bed Rolls for Coastal Planers
Troubleshooting the Coastal Planer
Drives for Coastal Planers 
Feed Rolls for Newman Planers
Upgrade your used
Newman Planer
&
Newman Feedtable 
Pineapples for Newman Feed-Tables
Used  Newman 
Planers & Parts
Feed Table Bed Rolls for Newman Planers
Troubleshooting the Newman Planer
Drives for Newman Planers 
Feed Rolls for Yates Planers
Upgrade your used
Yates Planer
&
Yates 
 Feedtable 
Pineapples for Yates Feed-Tables
Used Yates Planers
feedtables and Parts
Feed Table Bed Rolls for Yates Planers
Troubleshooting the  Yates Planer
Drives for Yates Planers