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KF700 Broken Power Drive Motor

[email protected] All Messages By This Member #140620 Hi F.O.G,? I have a 2007 Kf700 and the electronic rise and fall of the blade has stopped working. When I try to adjust blade height the motor makes a grinding noise but there is no movement.? I have contacted Felder who have suggested it needs a new worm gear motor for this.? Has anyone had any experience replacing this motor? Could you give any advice?? I have a quote for an engineer to come out but it is extremely expensive on top of the part and if I can replace it myself then I would like to.? Thanks,? Aidan?
[email protected] All Messages By This Member #141032 Hi all,? ? I didn't receive a reply to this but I just wanted to update in case this is ever relevant to someone else in the future (God knows these sorts of forums have got me out of sticky situations in the past).? ? Felder diagnosed the problem as being a broken cog in the rise and fall power drive motor for the blade. They said this motor will need to be replaced and I ordered the part (about ?850 here in the UK).? ? The part arrived yesterday and I have managed to make the repair myself today in a couple of hours. The motor is mounted to a plate with three bolts. It also connects to the threaded shaft (which rotates to move the blade housing up and down) with a grub screw in a collar. It's a simple matter of removing these three bolts and loosening the grub screw to release the motor. There are two electrical connections with simply pull apart and then the replacement motor can be fitted by following the steps in reverse. The exploded diagram in the manual will illustrate what I've mentioned here.? ? Happ to say the machine is back up and running now and I can move on. The technician said this was likely a result of the motor being overloaded, perhaps inadequate greasing/maintenance over the years, who knows.? ? Aidan?
Bryce Comer Member Profile All Messages By This Member #141033 Thanks for the update, It's always good to know how things turn out. Most impotantly, what the tech thought may have caused the issue in the first place. My old machine had manual handwheels, so it was easy to know when it was time for a bit of maintenance. Not necessarily the case with motor driven parts. It would happen slowly over time, and being able to tell the difference in sound might be tough. Glad you got it sorted out. Regards, Bryce -- https://www.brycecomerwoodworks.com/ https://www.youtube.com/channel/UCHdrRaAZd_pOa7wwbdNPUEw
Stan K All Messages By This Member #141034 Aidan, Thanks for sharing your experience. One would assume the cog breaking before the motor stalls would be a motor protection feature, but it sounds like they won't sell a cog separately from the motor? Now that you have your old one out, could you check how it is installed on the shaft? Stan Sent from for iOS toggle quoted message Show quoted text On Tue, Apr 29, 2025 at 11:39, Bryce Comer <bryce@...> wrote: Thanks for the update, It's always good to know how things turn out. Most impotantly, what the tech thought may have caused the issue in the first place. My old machine had manual handwheels, so it was easy to know when it was time for a bit of maintenance. Not necessarily the case with motor driven parts. It would happen slowly over time, and being able to tell the difference in sound might be tough. Glad you got it sorted out. Regards, Bryce -- https://www.brycecomerwoodworks.com/ https://www.youtube.com/channel/UCHdrRaAZd_pOa7wwbdNPUEw publicKey - [email protected] - 0xCAA04E5D.asc publicKey - [email protected] - 0xCAA04E5D.asc signature.asc signature.asc
imran All Messages By This Member #141035 开云体育 Stan, There must be something lost in translation. AFAIK, linear actuators have lead screws. So either the lead screw or the traveling nut must have gotten damaged. Since this is not likely to create a locked rotor type high current situation, not sure if it could be easily detected. Not an expert but thinking out loud. Imran Malik IAM Wood Creations toggle quoted message Show quoted text On Apr 29, 2025, at 5:04?PM, Stan K via groups.io <4279427@...> wrote: ? Aidan, Thanks for sharing your experience. One would assume the cog breaking before the motor stalls would be a motor protection feature, but it sounds like they won't sell a cog separately from the motor? Now that you have your old one out, could you check how it is installed on the shaft? Stan Sent from for iOS On Tue, Apr 29, 2025 at 11:39, Bryce Comer <bryce@...> wrote: Thanks for the update, It's always good to know how things turn out. Most impotantly, what the tech thought may have caused the issue in the first place. My old machine had manual handwheels, so it was easy to know when it was time for a bit of maintenance. Not necessarily the case with motor driven parts. It would happen slowly over time, and being able to tell the difference in sound might be tough. Glad you got it sorted out. Regards, Bryce -- https://www.brycecomerwoodworks.com/ https://www.youtube.com/channel/UCHdrRaAZd_pOa7wwbdNPUEw <publicKey - 4279427@... - 0xCAA04E5D.asc> <signature.asc>
Stan K All Messages By This Member #141036 That would make sense given that Felder referred to the motor as "worm drive" but I am still at a loss as to why a transmission issue would necessitate a whole motor replacement... Sent from for iOS toggle quoted message Show quoted text On Tue, Apr 29, 2025 at 15:00, imran via groups.io <imranwoodshop@...> wrote: Stan, There must be something lost in translation. AFAIK, linear actuators have lead screws. So either the lead screw or the traveling nut must have gotten damaged. Since this is not likely to create a locked rotor type high current situation, not sure if it could be easily detected. Not an expert but thinking out loud. Imran Malik IAM Wood Creations On Apr 29, 2025, at 5:04?PM, Stan K via groups.io <4279427@...> wrote: ? Aidan, Thanks for sharing your experience. One would assume the cog breaking before the motor stalls would be a motor protection feature, but it sounds like they won't sell a cog separately from the motor? Now that you have your old one out, could you check how it is installed on the shaft? Stan Sent from for iOS On Tue, Apr 29, 2025 at 11:39, Bryce Comer < bryce@...> wrote: Thanks for the update, It's always good to know how things turn out. Most impotantly, what the tech thought may have caused the issue in the first place. My old machine had manual handwheels, so it was easy to know when it was time for a bit of maintenance. Not necessarily the case with motor driven parts. It would happen slowly over time, and being able to tell the difference in sound might be tough. Glad you got it sorted out. Regards, Bryce -- https://www.brycecomerwoodworks.com/ https://www.youtube.com/channel/UCHdrRaAZd_pOa7wwbdNPUEw <publicKey - 4279427@... - 0xCAA04E5D.asc> <signature.asc> publicKey - [email protected] - 0xCAA04E5D.asc publicKey - [email protected] - 0xCAA04E5D.asc signature.asc signature.asc
imran All Messages By This Member #141037 开云体育 Aidan, Thanks for sharing the fix. This probably is a good time to remind members to grease the blade elevation dovetails. There are 2 holes for this purpose (going from memory) that should be visible once the blade cover is opened. I can’t recall if the blade needs to be removed. I thought I shared pics here but I can’t find my post. I will look for them and share when I get to my PC. Imran Malik IAM Wood Creations toggle quoted message Show quoted text On Apr 29, 2025, at 1:43?PM, hello via groups.io <hello@...> wrote: ? Hi all,? ? I didn't receive a reply to this but I just wanted to update in case this is ever relevant to someone else in the future (God knows these sorts of forums have got me out of sticky situations in the past).? ? Felder diagnosed the problem as being a broken cog in the rise and fall power drive motor for the blade. They said this motor will need to be replaced and I ordered the part (about ?850 here in the UK).? ? The part arrived yesterday and I have managed to make the repair myself today in a couple of hours. The motor is mounted to a plate with three bolts. It also connects to the threaded shaft (which rotates to move the blade housing up and down) with a grub screw in a collar. It's a simple matter of removing these three bolts and loosening the grub screw to release the motor. There are two electrical connections with simply pull apart and then the replacement motor can be fitted by following the steps in reverse. The exploded diagram in the manual will illustrate what I've mentioned here.? ? Happ to say the machine is back up and running now and I can move on. The technician said this was likely a result of the motor being overloaded, perhaps inadequate greasing/maintenance over the years, who knows.? ? Aidan?
imran All Messages By This Member #141038 Edited Here are the pics of grease points on K975 and the ways involved. I assume 700 series is similar. To be sure, I was able to run my fingers in the ways to ensure full coverage. ? ? ? Front ways: ? Rear ways: Imran Malik IAM Wood Creations toggle quoted message Show quoted text On Apr 29, 2025, at 7:57?PM, Imran Malik <imranwoodshop@...> wrote: Aidan, ? Thanks for sharing the fix. This probably is a good time to remind members to grease the blade elevation dovetails. There are 2 holes for this purpose (going from memory) that should be visible once the blade cover is opened. I can’t recall if the blade needs to be removed. I thought I shared pics here but I can’t find my post. I will look for them and share when I get to my PC. Imran Malik IAM Wood Creations On Apr 29, 2025, at 1:43?PM, hello via groups.io <hello@...> wrote: Hi all,? ? I didn't receive a reply to this but I just wanted to update in case this is ever relevant to someone else in the future (God knows these sorts of forums have got me out of sticky situations in the past).? ? Felder diagnosed the problem as being a broken cog in the rise and fall power drive motor for the blade. They said this motor will need to be replaced and I ordered the part (about ?850 here in the UK).? ? The part arrived yesterday and I have managed to make the repair myself today in a couple of hours. The motor is mounted to a plate with three bolts. It also connects to the threaded shaft (which rotates to move the blade housing up and down) with a grub screw in a collar. It's a simple matter of removing these three bolts and loosening the grub screw to release the motor. There are two electrical connections with simply pull apart and then the replacement motor can be fitted by following the steps in reverse. The exploded diagram in the manual will illustrate what I've mentioned here.? ? Happ to say the machine is back up and running now and I can move on. The technician said this was likely a result of the motor being overloaded, perhaps inadequate greasing/maintenance over the years, who knows.? ? Aidan?

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