amosuz Posted November 23, 2009 Share Posted November 23, 2009 hi I have four mac 250s and two of them wont focus. has the motor gone or is it something less costly thanks. Link to comment Share on other sites More sharing options...
Dodgecaliber Posted November 23, 2009 Share Posted November 23, 2009 Again down to the usual test route here, Are you using a terminator? If two of them are doing it and two are not it's a 50/50 chance of being a motor. Strip down the two dodgy ones and inspect them, then have the good heads, start adding in the dodgy ones alternatley incase the 3rd one is gubbed and the 4th one is just copying it. Link to comment Share on other sites More sharing options...
amosuz Posted November 23, 2009 Author Share Posted November 23, 2009 Again down to the usual test route here, Are you using a terminator? If two of them are doing it and two are not it's a 50/50 chance of being a motor. Strip down the two dodgy ones and inspect them, then have the good heads, start adding in the dodgy ones alternatley incase the 3rd one is gubbed and the 4th one is just copying it. I will try that thanks, if it is the motor do you know how much and where to get them in a hurry Link to comment Share on other sites More sharing options...
amosuz Posted November 23, 2009 Author Share Posted November 23, 2009 Again down to the usual test route here, Are you using a terminator? If two of them are doing it and two are not it's a 50/50 chance of being a motor. Strip down the two dodgy ones and inspect them, then have the good heads, start adding in the dodgy ones alternatley incase the 3rd one is gubbed and the 4th one is just copying it. I will try that thanks, if it is the motor do you know how much and where to get them in a hurry I have tried that, also I have tried them independantly and yes I do have a terminator in the end one.. Link to comment Share on other sites More sharing options...
aidso Posted November 23, 2009 Share Posted November 23, 2009 there is many things it could be. 1) stepper motor 2) driver IC 3) loom fault 4) protective resistors on main board and many other things. First thing I would do personally is to swap the stepper from a good head over to one of the faulty heads. if it works then its the stepper. If not then swap the driver IC of the control board and see if that sorts it. If not then meter out the cable from the control board to the stepper. If all the above fails then ring martin and get them to talk you through the protective resistor on the control board(very unlike to be this) Link to comment Share on other sites More sharing options...
Richard CSL Posted November 23, 2009 Share Posted November 23, 2009 I had a mac 250 where the fan had stopped, and the focus mechanism melted. open up the head and have a look and check the fan operation. the focus is a stepper motor conected directly to a threaded brass bar.. The lens assembly slides up and down on two rails. Link to comment Share on other sites More sharing options...
Aaron-Hill07 Posted November 23, 2009 Share Posted November 23, 2009 Sounds a bit odd that all 4 aren't working, are you trying to focus them via a console or manually through the menu? If your doing it from a desk, it may be the desk at fault therefore check each of the macs individualy and try it through the menu's. Link to comment Share on other sites More sharing options...
themadhippy Posted November 23, 2009 Share Posted November 23, 2009 Sounds a bit odd that all 4 aren't working try re reading dear boy,ive highlighted the important bithi I have four mac 250s and two of them wont focus. has the motor gone Link to comment Share on other sites More sharing options...
djandydee Posted November 24, 2009 Share Posted November 24, 2009 I have 8 MX10s which are a MAC250 Krypton in the form of a moving mirror and occasionally one or two of them had sticky focus worm drives. Martin advised a small touch with their white gear grease which helped. I also had a new Robe700 spot which had a focus error from new. This also turned out to be a dry slide shaft which needed a few spots of grease. Don't tell Martin, I used their grease on a Robe! ****But don't over do the grease**** Link to comment Share on other sites More sharing options...
amosuz Posted November 24, 2009 Author Share Posted November 24, 2009 hi thanks for all your replies I managed to sort it, two sticky motors were theculprit all working fine now. happy days Link to comment Share on other sites More sharing options...
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