Question about Kroy K 4350 Printer

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Kroy K4350 Gap Sensor Problems

I have been using my K4350 printer for a few years now and i just recently Bought a new computer with the latest Print shop software (print shop 23) And for some reason no matter what i try when i got to print labels it doesnt seem to wanna line up anymore. No matter how many times i calibrate the printer or how i set the gap setting between labels for the printer, It never seems to line up anymore. Any idea on what might cause this? The is suppose to be a .125 inch gap between labels and it always misses. Could it be a sensor issue? local computer store in town keeps telling me that its a driver issue, but i don't think it is, i even tried older drivers just in case.

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  • dargaard_kee Apr 26, 2009

    I was troubleshooting this on behalf of a friend i will have her give you a call first being that she will be more available then me



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Your problem is too complex to solve in one pass on this or any other forum. Give me a call at 800-304-9043 and I'll walk you thru it. I'm Don from Hanover Technical Sales.

Posted on Apr 24, 2009


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When I calibrate the Kroy K4350, it cuts off all of the material (about 1 foot) after it finishes calibration. This will get costly as we use the printer for heat shrink tubing and change sizes of tubing...

It appears that your printer has the cut bit set to cut, from a prior print job. Suggest that you do a short print job with the cutter set to NOT cut. That should change the instruction in the machine until it has been changed to cut again. By the way, the factory advises us that the K4350 should typically NOT be using the cutter to cut heat shrink. So you may want to change the setting to NOT cut for the long haul. If this does not solve your problem, you might give us a call. We're Hanover Technical Sales, Inc. We're a premier Kroy Dealer. Call (757) 357-2677 and ask for Don.

Oct 31, 2013 | Kroy K 4350 Printer

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Kroy printer K4350 error light comes on when ever the heat shink tubing starts to feed. Just pressing the feed button will cause the error light to come on. Heat shrink tubing feeds ok with the sensor...

I'm guessing that you are printing on narrow heat shrink. This problem is seen less often with wide tube. Here's why. The latest version of the K4350 has the media sensor slightly offset from dead center to accommodate certain types of side by side labels. Consequently, the electric eye that senses the presence of the media does not see the narrow tube and faults out, thinking there is not media in it. To fool the printer, place some opaque material where it will do the most good. Right under the sensor board. Look down in the throat of the printer when the carriage is open. You will see a tiny circuit board that has surface mounted components on it. The bottom side has the sensor that operates in conjunction with an infrared light source below the tube in a recessed area. From behind the carriage, slip a business card under the board, placing it forward until it almost touches the centering guides. Then tape it in place so it won't slip away and jam something up. Re-feed the tube over the card, but under the tiny board. The eye is totally blocked, so you will need to monitor the print process to make sure you don't run out of tube and start printing on the platen roller. That should work just fine for you. If that does not solve the problem, we're Hanover Technical Sales, Inc. Give us a call at 757-357-2677 and we'll help you thru the problem. Ask for Don

Mar 06, 2013 | Kroy K 4350 Printer

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K4350 300dpi, Windows 7, Bartender 8.01 build 2160, USB to Serial Converter, COM3 9600,8,n,1, Flow Control - any setting. 7/16" flat (1/4"dia.) Heat Shrink. After I print a label, the printer beeps an

Your Bartender software is probably set to print individual labels with a gap between them. Reset the software (document properties button) to Continuous label supply, and it should work. Still having problems? We're Hanover Technical Sales, a Kroy Support Site and Distributor. Give us a call at 757-357-2677 and we'll help you get to the bottom of it.

Jan 12, 2013 | Kroy K 4350 Printer

1 Answer

How do I calibrate the Kroy K4350 printer

Place the label material in the printe, making sure that it is fed below the tiny green circuit board that you will see down in the throat of the printer carriage.

Power off. Firmly hold down the Pause Button.
When the label material starts to feed, Release the Pause button.

When the material stops feeding, you should see two green lights.

If you are seeing a red light instead, you have either been feeding labels with a black mark on the reverse of the liner paper, or there may be some other problem, and you need more help. We're Hanover Technical Sales, Inc. We sell Kroy Label and Wire Marker supplies, and help people thru the little idiosyncracies that they encounter from time to time. Phone 757-357-2677 and ask for Don.

Aug 11, 2011 | Kroy K 4350 Printer

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Can't scan but can print through print server

Returned the printer to the store and bought an HP... It works great

Dec 28, 2009 | Canon Pixma MP500 All-In-One InkJet...

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How do you install 3/8" shrink ribbon into Kroy K4350 so the writing is centered correctly?

The issue is not how you center the tube, most likely. It's in how you set it up in your software. Give me a call, toll free at (800) 304-9043. I'm Don at Hanover Technical Sales, Inc.

Nov 18, 2009 | Kroy K 4350 Printer

1 Answer

Worked with computer, now it will print a few

please check you installed latest drivers of printer
check on the printer manufacturer website
download latest drivers

Nov 01, 2009 | HP LaserJet 4200n Printer

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Broken Kroy 4350?

You may have the tube threaded over the green sensor board, instead of below it..

What size tube is it. 1/8 and sometimes 3/16 lets infrared light past one side or the other and trips the sensor, making the machine think there is no tube in there, also.

We're Hanover Technical Sales, Inc. We do Technical Support for Kroy machines. If we're wrong, we don't have enough info.

Jun 10, 2008 | Kroy K 4350 Printer

3 Answers

Need help with Kroy K4350 Printer.

This sounds like a hot pixel failure on the print head. The hot pixels are not repairable. The entire head will have to be replaced, most likely, at a cost of about $300. Hanover Technical Sales, Inc. (that's us) does Technical Support for Kroy printers, so we know what we're talking about.

Could it be something else? Sure, but without a pic of the issue, we'd not be able to guess what else it might be.

Make sure that heat shrink tube is clean and free of static electricity. When possible, use Kroy brand tube in the K4350. And we have a new hybrid ribbon that minimizes static at the head ... and consequently minimizes hot pixel issues.

Dec 12, 2007 | Kroy K 4350 Printer

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