28th Jan 2019 - I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
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28th Jan 2018 - I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
Steve - why should I dump the printer just because of one small cog!
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29th Jan 2019 - So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on.
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29th Jan 2018 - So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on.
On close inspection of the cog I found that it has split so it will never clamp onto the splined area of the shaft so it will be totally reliant on the glue to get it to grip to the shaft.
What I have done now is to apply some epoxy glue to the shaft, sliding the cog over the glue and add more along the shaft after roughing it up to give the glue a better chance to stick. and because I have placed the printer on its side the glue will flow over the end of the cog and end up in the teeth. When the glue set I cut away the excess on the cog teeth but leaving as much there as possible.
I am now going to let the stuff set over night before I try to run the printer, but if that doesn't work at least now I have easy access to the area through the hole in the bottom of the printer where the paper sits.
I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
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28th Jan 2019 - I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
Steve - why should I dump the printer just because of one small cog!
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29thJan2019. So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on.
+
29th Jan 2019 - So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on.
On close inspection of the cog I found that it has split so it will never clamp onto the splined area of the shaft so it will be totally reliant on the glue to get it to grip to the shaft.
What I have done now is to apply some epoxy glue to the shaft, sliding the cog over the glue and add more along the shaft after roughing it up to give the glue a better chance to stick. and because I have placed the printer on its side the glue will flow over the end of the cog and end up in the teeth. When the glue set I cut away the excess on the cog teeth but leaving as much there as possible.
I am now going to let the stuff set over night before I try to run the printer, but if that doesn't work at least now I have easy access to the area through the hole in the bottom of the printer where the paper sits.
I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
Steve - why should I dump the printer just because of one small cog!
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29thJan2019. So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on. What I have done now is to apply some epoxy glue to the shaft, sliding the cog over the glue and add more along the shaft after roughing it up to give the glue a better chance to stick. and because I have placed the printer on its side the glue will flow over the end of the cog and end up in the teeth. When the glue set I cut away the excess on the cog teeth but leaving as much there as possible.
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I am now going to let the stuff set before I try to run the printer, but if that doesn't work at least now I have easy access to the area through the hole in the bottom of the printer where the paper sits.
+
29thJan2019. So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on.
+
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On close inspection of the cog I found that it has split so it will never clamp onto the splined area of the shaft so it will be totally reliant on the glue to get it to grip to the shaft.
+
+
What I have done now is to apply some epoxy glue to the shaft, sliding the cog over the glue and add more along the shaft after roughing it up to give the glue a better chance to stick. and because I have placed the printer on its side the glue will flow over the end of the cog and end up in the teeth. When the glue set I cut away the excess on the cog teeth but leaving as much there as possible.
+
+
I am now going to let the stuff set over night before I try to run the printer, but if that doesn't work at least now I have easy access to the area through the hole in the bottom of the printer where the paper sits.
I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
Steve - why should I dump the printer just because of one small cog!
+
+
29thJan2019. So now I have cut a hole in the base of the printer to gain access to the cog that drives the paper tractor. Now I can see whats going on. What I have done now is to apply some epoxy glue to the shaft, sliding the cog over the glue and add more along the shaft after roughing it up to give the glue a better chance to stick. and because I have placed the printer on its side the glue will flow over the end of the cog and end up in the teeth. When the glue set I cut away the excess on the cog teeth but leaving as much there as possible.
+
I am now going to let the stuff set before I try to run the printer, but if that doesn't work at least now I have easy access to the area through the hole in the bottom of the printer where the paper sits.
Hi Guys,
I have an HP Photosmart 7520 with the same small cog slipping problem. Glued it once but it only lasted a couple of weeks. So now I am trying a different approach. As the printer is basically scrap I am thinking there is no need to be gentle with the thing and as its vertually impossible to take apart with screw-drivers and tools. So lets look at it from a different angle. We need to gain access to the cog on its shaft to so that when glue is applied we can see how well it has stuck. My plan is to cut a hole in the base of the printer to gain access to the area around the drive shaft. Watch this space.
Steve - why should I dump the printer just because of one small cog!