Saw and Service Tips

DoALL Service Tip Sheet header


DoALL has over 80 years of expert band saw knowledge to share. Check out all the Saw and Service Tip categories below: 

Tips for Current DoALL Saws Tips for Blades and Cutting Fluids Tips For Controllers and Software
Saws No Longer in Production Miscellaneous Tips General Tips




Tips for Current DoALL Saws

Warranty Issues with STATIC PHASE Converters
Tips for Tilt-Frame TM-1822 Saw Guide Alignment

DoALL Models: TM-1822 and TF-1822

After the head of the machine is mounted to the carriage, we initially align the lower guide arm block so as to make the blade centered within the gap between the bed plates of the saw.  Once that is accomplished we remove the carbide guides from the upper and lower guide arm block assemblies and insert a 1.5” x ¾” x 24” piece of cold roller stock (this stock must be known as reliably straight). 

  • Use the carbide pad tensioning bolt to retain the straightedge in the upper guide arm. 
  • Adjust the alignment bolts on the upper guide arm retaining plate to cause the upper and lower guide arm blocks to be perfectly aligned. 
  • The straight edge bar should insert perfectly into the lower guide arm block by moving the upper guide arm downward.  
  • Check with a dial indicator against the side of the straightedge that the upper guide arm moves up and down in a straight line (within 0.006” over its range of movement). 
  • Check that during this process of alignment that the blade remained centered between the gap between the bed plates of the saw.
How to Adjust Insert Type Saw Guides on DoALL Vertical Contours

Models:  Models: All Vertical Contour Saws

1. Select the set of inserts marked for the width of the saw band used.
2. Place the right hand insert in the milled slot and tighten the screw lightly so that while the insert will slide in the slot, it will still hold its position when released.
3. Select the proper insert gage for the gage of the saw band used.
4. Please the gage in the opposite slot and adjust the insert so that it fits exactly into the notched end of the gage. Tighten the insert securely in place.
5. Place the left hand insert in the slot and tighten the screw lightly.
6. Place the gage edgewise between the two inserts. Then bring the left hand insert down so that it rests against the gage. When the gage is removed, the resulting gap between the inserts will provide proper clearance for the saw band.

Referenced from DoALL Historical Service Tip Sheet #179

How to Adjust Roller Saw Guides on DoALL Vertical Contours

Models:  Models: All Vertical Contour Saws

Use the roller guides for continuous high speed operations.

1. Select correct rollers for the width of the band to be used.
2. Place one back-up roller and side roller in each guide block.
3. Install the guides on the upper post and lower keeper post.
4. After the guides are placed on the machine, place the saw band over the wheels and adjust the tension.
5. Bring the rollers up to the band by turning the eccentric bearing shaft (in the center of the roller) with a screwdriver. The rollers should be just free enough to turn without moving the band.
6. Tighten the roller lock screw, which will prevent the eccentric shaft from turning.

Referenced from DoALL Historical Service Tip Sheet #179

Recommendations for Anchoring DoALL Saws to the Floor

DoALL Models: All Models

Set up and installation recommendations for anchoring a machine to the floor per industry standard rules and regulations:

1. Anchoring a machine to the floor requires careful shimming between machine base and floor.
2. Set-up machine, following procedures in the instruction manual.
3. Anchor bolts can be adjusted and tightened to keep machine in proper position.
4. Check lineup of beds and band points, especially on Power saws.

OSHA Reguation 1910.212(b) requires anchoring fixed machinery. Machines designed for a fixed location shall be securely anchored to prevent walking or moving.

Referenced from DoALL Historical Service Tip Sheet #112


Tips for Blades and Cutting Fluids

Can I use bleach to clean my sump?

We strongly recommend using DoKleen 3004 to clean the sump.

Bleach combines with the calcium and magnesium in water leaving behind salt, which is corrosive and exacerbates rust.

Pneumatic Lubricator Oil Change Procedure for Tilt-Frame TF-1418

DoALL TF-1418 Pneu lube oil tip image
DoALL Models: TF-1418

It is recommended to discard the oil currently in the lubricator bowl and replace.

Pneumatic lubricator on the model TF-1418 machines shown below. 

Oil Change Procedure:

1. Disconnect and turn off air supply to machine.
2. Rotate lubricator bowl counter-clockwise (CCW) until fully unthreaded from upper body.
3. Discard old oil into another container for proper disposal.
4. Fill bowl with new oil.
5. Reinstall bowl.
6. Reconnect and turn on air supply to machine.
7. Start saw band and turn to slowest feet per minute (fpm) setting.
8. Using adjustment knob set one (1) drop in sight glass every twenty to thirty (20-30) minutes.

Coolant Pump Leakage Even After Seal Replacement

DoALL Models: Power Saws, Grinders and Contour Saws

Issue: Incorrect procedure when installing replacement coolant pump seal DoALL part #: 2930.

Correction: Be sure the seal you install is new stock, as there were some problems with springs in teh past. Then install the seal according to the following instructions:

1. Remove pump from impeller housing.
2. Loosen set screw holding impreller to pump shaft, then remove impeller.
3. Remove entire seal.
4. Clean and polish pump shaft.
5. Lubricate shaft OD with oil, then install base portion of seal. Be sure it bottoms firmly.
6. The next section of seal must be pressed firmly against the base section for good seal. Add spring and washer.
7. Replace impeller with miniumu clearance between impeller and motor adaptor. Then tighten set screw.
8. The gasket, DoALL part #: 2928, should be replaced when new seal is installed. 

Referenced from DoALL Historical Service Tip Sheet #86


Tips For Controllers and Software

UniOP (Excor) Workstation Lamp Replacement Procedure

DoALL Models: Any model using UniOP (Excor) Workstation

Before starting please note that the screen contrast on the Workstation is adjustable and may have been accidentally lowered which will darken screen, possibly making it unreadable. To check for Workstation screen contrast setting:

1. While on main view screen press and hold the F1 key and toggle the up and down arrow keys.

or

1. Press and hold Enter key for three (3) seconds.
2. Using the arrow keys move cursor over to “System” and press Enter.
3. Move cursor down to “HI < Display > LO”.
3. Toggle Left or Right arrow keys to change screen contrast.
4. When adjusted move cursor up to Exit and press Enter.

Lamp Replacement Procedure

Important: If workstation is under Warranty period DO NOT replace lamp as this will void the Warranty.

Tools required:

  • Low heat solder iron
  • Electronics grade solder
  • Flat blade screwdriver

Workstation Lamp Replacement Procedure:

1. Prepare a large, clean, non-magnetic working surface.
2. Turn off main electrical disconnect on machine.
3. Remove Workstation from machine.
4. Lay Workstation face down on prepared work area.
5. On top and bottom of Workstation bend out four (4) metal tabs with straight blade screwdriver till they are flush with sides.
6. Carefully separate rear metal cabinet from front of Workstation.
7. Disconnect two ribbon cables from circuit board making note of their locations.
8. Disconnect the red and black wire plug on circuit board on back cover.
9. Disconnect green/Yellow ground wire from back of display board by removing mounting screw making note of their locations.
10. Lay back cover aside.
11. Remove remaining four (4) mounting screws holding display board to front face of Workstation.
12. Carefully lift off display board taking note of the five (5) metal 3/8” spacers between display board and front face of Workstation.
13. Turn over display board.
14. Remove four (4) mounting screws holding display screen to circuit board taking note of their location of two (2) 1/8” metal spacers under end with metal tabs.
15. Carefully raise end of display screen with white cover attached.
16. Remove white plastic cover by carefully prying out three (3) locking tabs. The lamp is the long glass tube with the pink and white wires attached taking note the routing of pink and white wires through the circuit board.
17. Carefully rotate display screen just far enough to access solder joints for pink and white wires taking note at which points the pink and white wires are attached. Be careful of white ribbon attached on end opposite of lamp, DO NOT detach ribbon cable.
18. Using a soldering iron, carefully remove and re-attach wires to circuit board.
19. Reassemble Workstation in reverse order.

Replacement Electrical Switches for Band Saw Machines

DoALL Models: All older DoALL machines

Ordering correct replacement electrical switches for customer machines

Most start-stop switches sold by DoALL have two (2) components consisting of a push button operator and a contact block. The operator is the visible part of the panel and the contact block is attached behind the panel. Operators are sued with various contact blocks depending on combination requirements. 

The IMPORTANT thing concerning replacements is that the operator AND the block must be of the same manufacturer. For this reason it is best to replace both parts at the same time. 

Referenced from DoALL Historical Service Tip Sheet #148

 

How to Temporarily Disable Band Stall Motion Detector on Saws using DC Exor Workstations

DoALL Models: All Models with (DC) Exor Workstations

Instructions for how to Temporarily Disable Band Stall Motion Detector - Band Stall faults during dry run while test running machine.

For ability to cycle machines in the field without the Band Stall fault continually coming on, follow these steps:
1. To temporarily de-activate the Band Stall function, with POWER applied to the machine but no hydraulics running, flip the Band Tension switch from ON to OFF 5 times. At this time the Zero Indicating light will turn on.
2. To reactivate the Band Stall function, turn the machines hydraulics off and back on.

Referenced from DoALL Historical Service Tip Sheet #406

No Run Light on Saws using GE FANUC Series 90-30 / CPU350

DoALL Models: All Saws using GE FANUC SERIES 90-30 / CPU 350

Issue: Controller has internal fault so there is no RUN light

DoALL GE FANUC image 

Correction: The 350 CPU's on the power saws with the newer electric revisions can be reset in the same manner using the key. There are three lights labeled (pwr)(ok)(run). Power the machine down and power back up. As the (ok) light blinks rotate the key switch from run to stop to run to stop and back to run. This will reset the fault.

No Run Light on 2 Column Machines Using VERSAMAX MICRO 28 PLC

DoALL Models: All 2-Column Saws using PLC VERSAMAX MICRO 28 I/O GE IC200UDR005G

Issue: Controller has internal fault so there is no run light.

Correction: There are three lights labeled (pwr)(ok)(run) with the toggle switch in the left hand door in the run position power down and power back up. As the (ok) light blinks toggle the switch from run to stop to run to stop back to run. This will reset the fault.

DoALL Tip 403 image - Versamax run light


Saws No Longer in Production

Head Feed Control Air Bleeding Procedure for C-916

DoALL Models: C-916

Oil replenishment and/or air bleeding can be done without removing the cylinder assembly from the machine.

Repair oil leak in the system first to eliminate having to perform this again in a short period of time.

Raise the saw head enough to remove the pipe plug from the top end cap of the cylinder. Return the saw head to the down position.

1. Using an oil bottle/can with a small filler tube extended into hole approx. 1”, SLOWLY pour ISO-VG grade 46 hydraulic oil or Dextron III transmission fluid (depending on what your system originally contained) into the open pipe port until overflow occurs.
2. Replace the pipe plug and turn the head feed control metering valve wide open.
3. Raise and lover the saw head to its maximum limits several times.
4. Repeat step #1 several times in necessary to purge excel air from the cylinder.
5. With the metering valve shut off, the piston should not sag more than 1/4” (6.0 mm) when the bandwheel is let go after full head raise and full extension of the head feed control cylinder piston rod. Sag or piston rod retraction being measure at the piston rod. 

DoALL Head Feed image

Incorrect Center of Twist when Changing Bearings or Wheels on TF-1421 and TF-2021

 DoALL Models: TF-1421, TF-2021M or TF2021NC Tilt Frame Series

Issue: Machines now have cup and cone bearings in the upper and lower bandwheels. If the bearing lock nut does not have the proper torque, the center of twist will not be correct when changing wheels or bearing. 

Correction: A socket (DoALL part #: 207897) to torque the bearing lock nut is available and is a requirement to service the impacted DoALL machines. The proper torque is 17 to 18 feet/pounds which will achieve proper bearing preload and center of twist. 

Referenced from DoALL Historical Service Tip Sheet #294

Intermittent Issues Sensing Top of Material to be Cut on C-3350NC Saws

DoALL Models: C-3350NC

Issue: Various issues with Reflectors causing sensor to malfunctions

Correction: Replacement with a new style Emitter / Receiver units which eliminate Reflectors

DoALL C-350NC Reflector Tip photo

DoALL C-3350NC machines are having intermittent problems with the head clear laser assemblies not properly sensing the top of the material correctly or in some cases not at all due to:

1. Dirty reflectors, cracked reflectors that are clouding up.
2. Mounting brackets on sending unit are coming loose which causes problems with sensing beam alignment

New style replacement kits have a Emitter Unit and a Sending Unit rather than using a reflector type system. For replacement Head Clear Laser Kits, Order DoALL part #: 223733.

 Referenced from DoALL Historical Service Tip Sheet #400

Proper Adjustment of Saw Guide Adjusting Screws for C-916 and 500 Series Saws

DoALL Models: C-916A, C-916M, C916S, 500-S, 500-DS and 500-SNC

Issue: Current production of machines coming from the factory has a few different saw guide adjusting screws being used. Seems there is some confusion on the proper adjustment of these items, thus this Service bulletin to help clarify.

Correction: DoALL part # 124419 (Knurled exterior) is used on models such as C916 series and 500 series machines.

To properly adjust these screws, Fully insert sawband up to back-up bearings, Using a flat blade screwdriver, Turn the saw guide adjustment screws CW till fully tight (Do not overtighten) then back off ¼ to ½ turn.

DoALL C-916 and 500 Series Adjust Screws

Proper Adjustment of Saw Guide Adjusting Screws for C-430A, C-30NC, DC-310NC

DoALL Models: C-430A, C-30NC and DC-310NC 

Issue: Current production of machines coming from the factory has a few different saw guide adjusting screws being used. Seems there is some confusion on the proper adjustment of these items, thus this Service bulletin to help clarify.

Correction: DoALL part #217390 (Smooth exterior) is used on models such as C430A, C330NC, DC310NC series machines. To properly adjust these adjusting screws, Fully insert sawband up to back-up bearings. Using a flatblade screwdriver, Turn the saw guide adjusting screw CW till the housing fully bottoms out on the sawguide arm. This is the preset placement for this particular style, DO NOT back off CCW.

DoALL Adjusting Screw C-430 saws

Proper Adjustment of Saw Guide Adjusting Screws for C-4100 and 800 Series

DoALL Models: C-4100 series and 800 Series

Issue: Current production of machines coming from the factory has a few different saw guide adjusting screws being used. Seems there is some confusion on the proper adjustment of these items, thus this Service bulletin to help clarify.

Correction: DoALL part #: 318170 (Long Knurled exterior) is used on models C4100 and 800 series machines. To properly adjust these adjusting screws, Fully insert sawband up to back-up carbide. Using a flatblade screwdriver, Turn the saw guide adjusting screw CW till the housing fully bottoms out on the sawguide arm. This is the preset placement for this particular style, DO NOT back off CCW.

DoALL Adjust Screw for 800s


Misc. Tips

Proper Storage of Belts

DoALL Models: ALL

For proper storage of belts it's suggested to:
- store in a cool dry plate, never in direct sunlight
- if stored on shelves in piles, keep the piles small to avoid excess weight distorting the belts on the bottom
- if stored in boxes, see that the box is large enough to prevent distortion of the bottom belts. Belts will take a permanent set if they are crammed into small areas.

Do's and Don’ts and Conditions to Watch For:
- Don't store belts on the floor as water and moisture can easily permeate
- Don't store belts near a window to avoid sunlight and weather
- Don't store near radiators or air flow sources
- Watch the temperature as anything about 85 degrees reduces serviceability and belt life
- Watch the humidity as moisture can decrease belt life and can cause fungus growth

The manufacturing process called "curing" is intended to bring belts to the desired point of hardness and tensile strength. Curing beyond this point reduced tensile strength and increase hardness. Belts continue to cure indefinitely, though at a reduced rate. For this reason, use your older belts first after making sure they are in a relaxed condition. An un-relaxed belt may take a set. This set may not affect belt life, but in can cause a vibration in the band drive. 

Temporary distortion of a belt in shipment is normal and should not take a permanent set. 

Standards above are from the Rubber Manufacturers Association, which provides some tips for belt storage. Under good conditions, well-made belts retain their initial serviceability and length. However, poor conditions can rapidly deteriorate the shelf life of a belt. 

Referenced from DoALL Historical Service Tip Sheet #109

Hydraulic Couplers Prior to October 1, 1991

DoALL Models: All Machines with hydraulics prior to 10-1-1991

DoALL Original Couplers (part # 123549 and 124572) Developed Leaks

At the time of original saw production, the couplers listed above were the best offered from our supplier. New developments and technology have improved coupler technology.

The new couplers hold the same part numbers, but must be replaced as a unit (both halves) on older machines.  

Referenced from DoALL Historical Service Tip Sheet #270

Hydraulic Motor is Running Backwards on Saws with AC Inverter Band Drives

DoALL Models: All Machines with AC Inverter Band Drives

Issue: Incoming 3 Phase power is incorrect so the hydraulic motor runs backwards yet the band motor runs in the correct direction

Correction: Reverse any two leads

We have had numerous calls from machine installations stating the hydraulic motor is running backwards. Customer
thinks they have the incoming 3 phase power correct as the band drive is turning the correct direction. 

All AC inverters automatically correct for incorrect phasing on their incoming power. If this situation is found, reverse any two main incoming power leads to correct the hydraulic motor rotation. AC inverter will automatically switch its phasing thus keeping the saw band running the correct direction.

Referenced from DoALL Historical Service Tip Sheet #405

Correcting Minor Cut Length Differences Using Kerf

DoALL Models: All

Please Note: This procedure is to correct only minor cut length differences. Technician must first check all mechanical parts for interference which could also cause part lengths not to be within spec (such as encoder, belt, pulleys, vise alignment interferences (under clamped condition, etc):

1. Measure the actual kerf of the band by making and measuring a slot cut in a piece of scrap material. Enter this value into the kerf setpoint.
2. Cut three (3) 0.500" parts. Average the measured lengths of these parts. Enter 0.971 or 971 in the kerf set point and press enter. If required adjust the machine comp value to the actual averaged measured length you obtained from the above calculation enter a negative value when parts measure over 0.500 or nter a positive value when parts measure under 0.500.
3. Cut three (3) 5.00" parts. Average the measured lengths of these parts, multiply x eight (8). Adjust the scale factor value according to the chart below.

These steps should get the machine within specs. If further adjustment is preffered then adjust either setting to try and obtain the desired accuracy.

DoALL Kerf chart                   

Saw Guide Adjustment and Maintenance for DoALL Vertical Contours

DoALL Models: All Vertical Contour Saws

Upright saws, depending on the sawing application, utilize standard saw guides, heavy-duty saw guides and, in some cases, roller guides. The standard saw guides utilize chevron saw guide inserts and a low speed back-up bearing. The high speed saw guides utilize chevron saw guide inserts and a high speed back up bearing. The roller guides utilize two rollers, a side roller and a back-up roller. The back-up rollers serve as a band guide and also as the back-up bearing for the saw band.

Problems which can occur with any of the above saw guides relate to worn parts such as bearings, bearing caps or the chevron inserts.  The back-ups should be inspected regularly to determine whether replacement is necessary. In the process it can also be determined if both back-ups and bearings need replacement.

Reverse the pivot back-up inserts for additional wear life. Replace when all surfaces are worn. If proper adjustment is not accomplished, corked cuts and band damage can occur. 

Referenced from DoALL Historical Service Tip Sheet #179


General Tips