I replaced ic4, 5 and 6 yesterday and it might have solved the problem. I think ic6, 4046 PLL, was faulty. It seemed to be somehow leaking some of the signal to ground via its zener or something. I...
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10-16-2021, 06:13 AM
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Re: Bridgeport Interact 1 Mk2 Spindle drive "tacho loss"
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10-14-2021, 04:24 PM
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https://1drv.ms/b/s!Am1Uj4kzNQg-hKFgGaNB1H_38ggjTw...
https://1drv.ms/b/s!Am1Uj4kzNQg-hKFgGaNB1H_38ggjTw
Link to manual above. -
10-14-2021, 04:19 PM
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I am seeing 50hz at tp2 only, after that nothing....
I am seeing 50hz at tp2 only, after that nothing. Also at tp2 should be 15v square wave but it is only about 8,4v square wave. Ic5 and Ic6 are phase-locked loops (cd4046bc). Ic6 is for adjusting...
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10-13-2021, 09:38 PM
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Re: Bridgeport Interact 1 Mk2 Spindle drive "tacho loss"
Okay so I have narrowed it down to IC5 and IC6 which are in loop supposed to multiple signal frequency from 50Hz to 300Hz for 6 thyristor circuits. It looks like that those IC:s are missing...
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10-11-2021, 11:16 AM
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Re: Bridgeport Interact 1 Mk2 Spindle drive "tacho loss"
Pdf attached.
I guess what I would like to know is what else could cause the tacho loss led to light up? -
10-11-2021, 07:15 AM
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Bridgeport Interact 1 Mk2 Spindle drive "tacho loss"
Hello
I just bought an old Bridgeport cnc mill and it actually did work, for about 5 minutes:). However after couple of test runs the spindle didn't start anymore. KTK drive board and MT1-1 boards...
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