Question about Topcon Rlh3c Rotating Laser Level W Receiver

1 Answer

Have older Topcon RL-H ,someone picked the unit up and put it over his shoulder while it was still running.Now it will level and then run about 1o seconds then either stop and re level or just shut off

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 87 Answers

It's likely leveled past it's leveling limit. You can try pulling out the 4 screws holding the bottom out, and very carefully opening the bottom of the laser. The main circuit board is attached to the base, so do not pull apart hard or too far. Next mark all the connectors on the board, and what wires go to them, and pull them all out. Remove the bottom completely and you should see the leveling assembly. Move the gears so the leveling system is more centered. Put it back together and test. If it doesn't work then you have something mechanically out of alignment or electronic values have messed up, and you have have to bring it somewhere for repair.

Posted on Jan 25, 2015

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 2 Answers

SOURCE: my topcon marksmen rl-60b lazer

taken from Pauldos Personal Laser Blog,
http://www.pauldos.com/lasers/article.php?article=1193142611
The Topcon RL-50B and RL-60B leveling lasers use a fairly unique compensator arrangement. Most leveling lasers use a suspended compensator arrangement, with a lens or mirror on the pendulum. The pendulum is usually metallic, and inside another metallic barrel, so that an electrical connection between the pendulum and outer barrel indicates to the electronics that the compensator is 'out of range'. The RL-50B/60B has a fluid compensator system where the laser beam is reflected off an interface between the fluid and a window, with the level of the fluid influencing the reflection angle of the laser beam. Because there is no electrical aspect to the compensator, an optical system is used to detect when the compensator is 'out of range'. In the output structure of the laser, a glass window at forty-five degrees is used to reflect a small portion of the beam to a photo detector. When the laser is level, the small portion of laser beam strikes the photo detector.

A common fault with these lasers is to constantly indicate 'out of level'. This occurs when there is insufficient beam intensity on the photo detector. The standard solution for this fault is to clean the 45 degree window. Sometimes, this does not bring the laser back to life. I have stripped down a couple of these lasers to try and figure out what is going on.
At first, I thought that maybe the laser diode could be down on power, reducing the available beam, but I quickly discounted that, because the laser diode output is feedback controlled, so the output power is stable up until the point of complete failure. One of the units I disassembled had cracks in the compensator housing, and the fluid level was low. I don't know whether the fluid leaked or evaporated, but in either case, there was no way the compensator could be repaired. In another unit, I noticed that the fluid was discoloured. Since I don't know what the composition of the fluid is, I don't know what could cause it to discolor. Perhaps extremes of heat or cold may damage the fluid. If the fluid is discolored, that may reduce the available laser power at the output. The question is, can we compensate for this? (pun not intended)

I decided to reverse-engineer the photo diode circuit, and see if there was any way to improve it. There is. The photo detector amplifier is a standard op-amp inverting amplifier. The feedback resistor, surface mount R23, is 470K. I changed this resistor to 680K to increase the gain of the amplifier, and bingo! the laser works like a real one again. Extensive testing in the workshop and in the field shows that the laser functions as originally designed in all ways. I have done this modification to over fifty of these lasers now, and the modification extends the life of the laser anywhere from a few months to a few years, with the average about one and a half to two years. Customers are always happy to not have to buy a new laser for another year or so, so this modification is always embraced when offered. I have never figured out what is going on with the fluid, but since I have a solution (again, pun not intended), I don't care.

cleaning instructions :
Remove the housing. Remove the battery holder. Loosen two small silver grub screws on the turret. Lift turret off. Clean slant window with acetone and a cotton bud. Avoid smearing the glue in the corners over the window. Flatten and curve a cotton bud to clean the inside of the slant window. Clean the folding mirror under the slant window. Replace the turret. Turret has a small amount of play, so align it for best operation before tightening grub screws. Re-fit battery holder and housing. All done!

Posted on Nov 30, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

How do I calibrate a topcon laser ?


There are detailed instructions in your users manual on how to check and adjust your Topcon laser. You'll need a tripod, 2 vertical surfaces about 50 meters apart and your laser receiver. It's done by marking positions of the beams, on the different surfaces and then adjusting your laser position to the center of the different positions.
The procedure is different for different models, but i have attached some pictures from the manual for the RL-VH4 series. calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-0.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-2.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-5.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-9.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-14.jpg

Aug 11, 2014 | Topcon Rotating Builders Red beam Laser...

1 Answer

No laser beam on topcon rlh3c laser level


Take this to a survey/laser repair shop, preferably one that does not charge for estimates.. The laser diodes on the RL-H3C is not serviceable. It requires the lens barrel assembly (or telescope tube unit, i don't remember what they call it in these). It's unreasonably expensive, and will likely be a write off. It may however be the main circuit board, but likely not. Be prepared to replace this unit.

Feb 25, 2014 | Topcon Rlh3c Rotating Laser Level W...

1 Answer

Laser won't turn on


Likely it's dirty battery contacts. Clean the contacts on the battery tray, and the coil springs in the laser, and it should start.
If not open the laser, reinsert the battery tray with good batteries and test the voltage at the battery connector at the rear of the laser.
Check for signs of water damage or corrosion.
short out the power switch, to make sure it's not the problem.
The switch circuit board, power connectors, battery tray, and motors are the only electronic parts still available for these lasers, and that is only because they share them with the RL-H3A, which was only discontinued in 2011. If none of the above will make it turn on, you'd need to find used parts, and try and rebuild it.

Jan 28, 2013 | Topcon Rl-hb Rotating Laser Level W/ls-70b

3 Answers

Topcon rl-hb wont level


I have one of this model too and have the same problem. It spin and spin but won't level. After a couple of minutes it stops and the power led fast blink.

Sep 23, 2012 | Topcon Rl-hb Rotating Laser Level W/ls-70b

1 Answer

Topcon rl-60b


Hopefully it's the simple answer. The bubble vial may be out. start where the level vial says is level, and move outwards in slow circles to try and find a place the laser thinks is level. if you find a spot, use the 3 adjustment screws on the bottom of the bubble vial to make that your new center.
Otherwise, it's a not good news. A couple things could be gone wrong. The oil bath compensator could have leaked. If you open the laser, and it's oily inside, throw it away.
It could be the peep site could need adjusting, or the laser diode could be blown. If the laser diode is dead, same solution as the compensator leaking. There are no parts available for these anymore, chuck it out.
The peep site isn't a write off, per se. The laser operates by shooting the beam through a oil bath, which compensates for the instrument not being perfectly level, and then through a splitting lens. part of the beam travels up, and through the rotating head. And the rest goes through a peep site, to a light reflecting area of the main circuit board. if the board or peep site is no longer aligned, the laser will never think it's level. The bad news about that, it is a very tricky and time consuming repair, that few technicians know how to do, or if they do know how are most aren't comfortable doing it.
You can try taking the cover off, leveling the instrument, powering it up and trying to move the circuit board until the laser thinks it's level, but i wouldn't waste much time on it.

Aug 27, 2012 | Topcon Rl-60b Rotating Laser Level C/w...

1 Answer

My Topcon RL-H3A continually attempts to levvel its self then runs for a short while then goes into a like stand by mode with the out of balance off light (red) and Power light (Green) flashing Thisn...


Sound like the laser diode is failing. It's power is likely just strong enough to get the level position right, then dims as it runs. The unit, no longer seeing the laser, decides it's out of level and stops. Or the oil in the compensator is leaking, and the same process is happening. Unfortunately the replacement part is not economical to replace.

Dec 02, 2010 | Topcon Rlh3a Long Range Rotating Laser...

1 Answer

Will not level


Most likely what's happening is the laser spins and it will level to the front corner, then the far back corner, then back to the middleish, and rotates at a slow speed, and error lights flash, right?
Couple things can cause this. First, the compensator uses an oil bath to decide it's level position. It shines the laser through the oil, and a detector sees the reflection and moves up or down to adjust the reflected beam to the center. If either the oil has leaked, or the laser diode has failed, the sensor will not see the beam to level. If you open it up, and it's oily inside, the compensator has definitely leaked. Laser and oil bath compensator are 1 part, not available anymore. Chuck it out.
If not oily inside, there's a small circuit board on the side of the compensator that is plugged in to the circuit board below. This is the leveling sensor. I've been told by another technician that unplugging this connector, and plugging it back in after 30 seconds or so can bring them back to life. I've never had it work, but I always try.
Last thing it could be is the encooder/encooder wheel. on the back of the compensator there is a small sensor that is right below the rotating head. There is a picket fence sticker on the underside of the head. if the sticker is worn, bubbled or damaged, it may not be picked up by the encooder. or the encooder may be faulty. The head gear/encooder wheel assy is still available as it's used in other units. you may still be able to get the encooder too, they changed them part way though production, depends on the version you have.

Jul 02, 2010 | Topcon Rlh3c Rotating Laser Level W...

Not finding what you are looking for?
Topcon Rlh3c Rotating Laser Level W Receiver Logo

Related Topics:

543 people viewed this question

Ask a Question

Usually answered in minutes!

Top Topcon Measuring Tools & Sensors Experts

Brad Brown

Level 3 Expert

15441 Answers

Vuk B

Level 3 Expert

678 Answers

Are you a Topcon Measuring Tool and Sensor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...