[CAM1911]

Hello,

I have a problem with my WMD30/BF30 RPM display, in which it stopped showing the RPM values. I have checked the circuit board "cesx 1101-28", which is common in many versions of machines i.e. G0704 and all small Chinese mills.I cannot understand where is this problem coming from. I am also attaching a small video showing how it all started. The machine is still working as before but without any RPM display. Can anybody help or have had this issue?

[Fastest1]

I have had the problem intermittently. No solution at this time though it doesnt concern me much. I do have a handheld Tach if needed.

IIRC at one time I changed power supplies over to a wall wart. Another member here had tried to split the signal to feed to Mach also. I am not sure how that turned out.

[CAM1911]

I have had the problem intermittently. No solution at this time though it doesnt concern me much. I do have a handheld Tach if needed.

IIRC at one time I changed power supplies over to a wall wart. Another member here had tried to split the signal to feed to Mach also. I am not sure how that turned out.

Hi, thanks for your reply. I have connected a 5v supply to the rpm display and it worked so i thought it has to do something with the circuit board power supply. I tried to change the board with a new one but had no luck, it still didnt work so now my machine supplier is trying to figure it out with the machine manufacturer. I'm still waiting for a reply.

Lets hope that he has a solution or maybe someone else had this issue and solved it. At least i'll have somewhere to look at.

Thanks anyway.

[Fastest1]

I dug a little deeper. Here is a link http://www.cnczone.com/forums/bencht...uestion-5.html

[CAM1911]

I dug a little deeper. Here is a link http://www.cnczone.com/forums/bencht...uestion-5.html

Hello, i cannot recall anything with that link you gave me. There isn't my RPM display problem mentioned. Can you enlighten me please?

[Fastest1]

Post 45 on that link has some info on the tach part part of that board. Michael was working on the tach and the contactor in that thread.