OK since I toasted the stepper motor in my first scanner (replacement is not an option unless by chance I can find a direct replacement), I am going to move on to the second scanner I have in stock (I am trying to make a etchant agitator),Sadly it appears that this one has a bipolar stepper (only 4 wires). I have read thisand it looks like I am going to need a H-Bridge. Anything else I should know before I order parts?I wanted to try and hack into the existing circuitry. With this old scanner it is likely that there will be less custom chips so easier to hack, but the circuitry is so buried it will be a major feat just to get to it. And I am afraid I would damage the scanner in doing so.Good news is this old scanner is far more robust and rugged than these wimpy new ones. OK since I toasted the stepper motor in my first scanner (replacement is not an option unless by chance I can find a direct replacement), I am going to move on to the second scanner I have in stock (I am trying to make a etchant agitator),Sadly it appears that this one has a bipolar stepper (only 4 wires).

Besides inadequate voltages and currents, resonant frequencies are the toughest issues to fix, if a stepper is skipping pulses, hence a feedback control loop is required to solve the problem. Steppers are good enough to hold open loop position con. Epilog 11 Articles Stepper Motor Controller From Old Scanner. Taking the ULN2003 chip from the scanner motor controller and putting it on a fresh board. Hackaday, Hack A Day.

I have read thisand it looks like I am going to need a H-Bridge. Anything else I should know before I order parts?I wanted to try and hack into the existing circuitry. With this old scanner it is likely that there will be less custom chips so easier to hack, but the circuitry is so buried it will be a major feat just to get to it. And I am afraid I would damage the scanner in doing so.Good news is this old scanner is far more robust and rugged than these wimpy new ones.

Don't waste your time with home made solutions that don't have current limiting. Standard practice is to drive steppers at well above their spec'd voltage but limiting the current. A scanner's stepper motor will be pretty low powered so they are pretty easy to toast as you found out. Those TB6600 drivers are way overkill. I would look at getting a pololu style step stick or rep-rap.

As a precaution, you also can before you begin. Appointment made on iphone not showing up in outlook for mac 2016. Note: If you’ve used export before, the previous folder location and file name appear. .On the File tab, choose Open & Export Import/Export.In the Import and Export Wizard, choose Export to a file Next.Under Create a file of type, choose Outlook Data File (.pst) Next.Under Select the folder to export from, choose the folder to export and only information in that folder is exported.Select the Include subfolders check box to make sure everything—Calendar, Contacts, and Inbox—in the account will be exported, and then choose Next.Under Save exported file as, click Browse to select where to save the Outlook Data File (.pst), type a file name, and then click OK to continue. Type a different file name, and then click OK.If you are exporting to an existing Outlook Data File (.pst), under Options, specify what to do when exporting items that already exist in the file.Click Finish.Outlook begins the export immediately unless a new Outlook Data File (.pst) is created or a password-protected file is used.If you’re creating an Outlook Data File (.pst), an optional password can help protect the file.

It's what's used in most DIY 3D printers. Super cheap and will handle up to about 2A. It has current limiting which is what you need when you over-volt the steppers.And ebay search for not much money. Search for rep-rap drivers.