#101157

Hi all
I am having issues with my CF 741 combination machine. It quite regularly goes dead and refuses to start.
The master switch which controls which part of the combo is functioning has a setting for reverse direction shaper. When you select this, a yellow light is illuminated so it offers an indirect way of finding out whether the machine is powered up. Mostly when I have the no start the yellow light comes on, this seems to indicate a safety microswitch issue. However I recently had an incident where the yellow light did not come on and I fiddled with the red mushroom switch on the jointer and it came good. You have to rotate this switch so that it pops out and I suspect mine may be a bit flaky, has anyone had problems with these? most of the time however I think the problems are due to the safety micro switches.
The microswitch on the saw blade cover is an issue, if I have a cover fully shut the saw won't start, I have to leave at about half an inch ajar. You can generally hear these switches clicking, is this clicking any indication that they are actually working electrically?
Is it the case that if any of the safety micro switches are not enabled for any part of the combo machine nothing will work? That is to say if a microswitch for the saw is indicating a problem then you can't start the jointer. If this is the case it does seem rather daft as it makes it really hard for the poor user to work out which micro switches are at fault. Is it safe to blow the microswitches? with air and is this likely to do any good?
I believe the CF 741 as the following micro switches:
saw blade cover open
planer jointer table down
planer jointer table up
dust hood in planar mode
dust hood in jointer? mode

Is there any way of easily diagnosing which is at fault?

thanks

Murray

#101159

开云体育

Felder had me test the current in the electrical panel. ?As I’m incompetent electrically, I could not replicate what was necessary to get it working. ?There is an electrical diagram in a pocket on the electrical door cover. ?You could see if yours is there, otherwise call Felder tomorrow morning.

Show quoted text

On Jan 25, 2020, at 10:40 PM, murrayau1 <murraywp@...> wrote:

Hi all
I am having issues with my CF 741 combination machine. It quite regularly goes dead and refuses to start.
The master switch which controls which part of the combo is functioning has a setting for reverse direction shaper. When you select this, a yellow light is illuminated so it offers an indirect way of finding out whether the machine is powered up. Mostly when I have the no start the yellow light comes on, this seems to indicate a safety microswitch issue. However I recently had an incident where the yellow light did not come on and I fiddled with the red mushroom switch on the jointer and it came good. You have to rotate this switch so that it pops out and I suspect mine may be a bit flaky, has anyone had problems with these? most of the time however I think the problems are due to the safety micro switches.
The microswitch on the saw blade cover is an issue, if I have a cover fully shut the saw won't start, I have to leave at about half an inch ajar. You can generally hear these switches clicking, is this clicking any indication that they are actually working electrically?
Is it the case that if any of the safety micro switches are not enabled for any part of the combo machine nothing will work? That is to say if a microswitch for the saw is indicating a problem then you can't start the jointer. If this is the case it does seem rather daft as it makes it really hard for the poor user to work out which micro switches are at fault. Is it safe to blow the microswitches? with air and is this likely to do any good?
I believe the CF 741 as the following micro switches:
saw blade cover open
planer jointer table down
planer jointer table up
dust hood in planar mode
dust hood in jointer? mode

Is there any way of easily diagnosing which is at fault?

thanks

Murray

#101161

开云体育

All the micro switches and stop buttons are wired together (NC normally closed), if you have a yellow light when in reverse, then the circuit is good. If the yellow light is on and it still wont start, then it could be the start buttons, they are all momentary switches (NO, normally open). All the switches on the machine can be effected by dust, some folks have had luck taking the covers off and blowing things out, some you just have to replace.

You can check them using a multimeter, but you have to get access to the wiring.

Brian Lamb
blamb11@...
www.lambtoolworks.com

Show quoted text

On Jan 25, 2020, at 10:40 PM, murrayau1 <murraywp@...> wrote:

Hi all
I am having issues with my CF 741 combination machine. It quite regularly goes dead and refuses to start.
The master switch which controls which part of the combo is functioning has a setting for reverse direction shaper. When you select this, a yellow light is illuminated so it offers an indirect way of finding out whether the machine is powered up. Mostly when I have the no start the yellow light comes on, this seems to indicate a safety microswitch issue. However I recently had an incident where the yellow light did not come on and I fiddled with the red mushroom switch on the jointer and it came good. You have to rotate this switch so that it pops out and I suspect mine may be a bit flaky, has anyone had problems with these? most of the time however I think the problems are due to the safety micro switches.
The microswitch on the saw blade cover is an issue, if I have a cover fully shut the saw won't start, I have to leave at about half an inch ajar. You can generally hear these switches clicking, is this clicking any indication that they are actually working electrically?
Is it the case that if any of the safety micro switches are not enabled for any part of the combo machine nothing will work? That is to say if a microswitch for the saw is indicating a problem then you can't start the jointer. If this is the case it does seem rather daft as it makes it really hard for the poor user to work out which micro switches are at fault. Is it safe to blow the microswitches? with air and is this likely to do any good?
I believe the CF 741 as the following micro switches:
saw blade cover open
planer jointer table down
planer jointer table up
dust hood in planar mode
dust hood in jointer? mode

Is there any way of easily diagnosing which is at fault?

thanks

Murray

#101162

I have the same issues with a CF 731, happened twice?

Can't help re repair, but would be interested to know if other combi owners are having the same issues.? ?

Regards?

Chris Twigger in the UK

#101163

My 2006 vintage CF741P was in storage while I moved to a new house and built a new shop. I had a permanent problem after I moved the machine to the new shop not being able to start any of the functions on the CF741P so I traced the diagram and found the bad STOP switch. I found a replacement on Amazon, much cheaper and quicker to get:

Also the switch actuator for raising and lowering the planer table broke and I found the exact replacement on Amazon:

I hope this will be helpful to someone.

Ariel

#101164

开云体育

The only info I will add is that, from your description of blade cover MicroSwitch, your switch is working. It disables and enables, so both positions are providing whatever is necessary, electrically. So you should be able to adjust the position of the switch to make it work as intended. The screws on the MicroSwitch on the blade cover of K975 (diff cover) go in slots, so it can be moved fwd/backwards. Hopefully, yours is similar.

Imran

On Jan 26, 2020, at 8:40 AM, murrayau1 <murraywp@...> wrote:

?Hi all
I am having issues with my CF 741 combination machine. It quite regularly goes dead and refuses to start.
The master switch which controls which part of the combo is functioning has a setting for reverse direction shaper. When you select this, a yellow light is illuminated so it offers an indirect way of finding out whether the machine is powered up. Mostly when I have the no start the yellow light comes on, this seems to indicate a safety microswitch issue. However I recently had an incident where the yellow light did not come on and I fiddled with the red mushroom switch on the jointer and it came good. You have to rotate this switch so that it pops out and I suspect mine may be a bit flaky, has anyone had problems with these? most of the time however I think the problems are due to the safety micro switches.
The microswitch on the saw blade cover is an issue, if I have a cover fully shut the saw won't start, I have to leave at about half an inch ajar. You can generally hear these switches clicking, is this clicking any indication that they are actually working electrically?
Is it the case that if any of the safety micro switches are not enabled for any part of the combo machine nothing will work? That is to say if a microswitch for the saw is indicating a problem then you can't start the jointer. If this is the case it does seem rather daft as it makes it really hard for the poor user to work out which micro switches are at fault. Is it safe to blow the microswitches? with air and is this likely to do any good?
I believe the CF 741 as the following micro switches:
saw blade cover open
planer jointer table down
planer jointer table up
dust hood in planar mode
dust hood in jointer? mode

Is there any way of easily diagnosing which is at fault?

thanks

Murray

#101165

开云体育

I had a problem starting the saw only on my CF 741.? All other functions worked.? The plugs that connect to the saw start and stop buttons came loose behind the panel.? So to trouble shoot there are interlock switches on the slide cover, the planer and planer hood.? These are connected in series to the e-stop and push button stops.? (why there is a mix of e-stops and push button stops is a German engineering mystery)? Push any one of these to drop out power to the magnet that holds a motor on function.? In my case, pushing the stop button on the saw when the planer was running did not stop the planer. This pointed to a bad connection at the saw start-stop button panel.

?

Jon S

?

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From: [email protected] [mailto:[email protected]] On Behalf Of ahazi
Sent: Sunday, January 26, 2020 7:33 AM
To: Chris Twigger; [email protected]
Subject: Re: [FOG] CF 741 intermittent start

?

My 2006 vintage CF741P was in storage while I moved to a new house and built a new shop. I had a permanent problem after I moved the machine to the new shop not being able to start any of the functions on the CF741P so I traced the diagram and found the bad STOP switch. I found a replacement on Amazon, much cheaper and quicker to get:

Also the switch actuator for raising and lowering the planer table broke and I found the exact replacement on Amazon:

I hope this will be helpful to someone.

Ariel

?

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