Announcement

Collapse

Forum Rules and Etiquette

Our mission ...

This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


Rule 1: Remain civil and respectful

There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Rule 2: Stay close to the original topic being discussed
  • If you are starting a new thread choose a reasonable sub-forum to start your thread. (If you choose incorrectly don't worry, we can fix that.)
  • If you are responding to a thread, stay on topic - the original poster was trying to achieve something. You can always start a new thread instead of potentially "hijacking" an existing thread.



Rule 3: Contribute something meaningful

To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
  • This is not a chat room. If you are taking less than 30 seconds to make a post then you are probably doing something wrong. A post should be on topic, clear, and contribute something meaningful to the discussion. If people read your posts and feel that their time as been wasted, they will stop reading your posts. Worse yet, they will stop visiting and we'll lose their experience and contributions.
  • Do not bump threads.
  • Do not "necro-post" unless you are following up to a specific person on a specific thread. And even then, that person may have moved on. Just start a new thread for your related topic.
  • Use the Private Message system for posts that are targeted at a specific person.


Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
  • "PM Sent!": Do not tell the rest of us that you sent a PM ... the forum software will tell the other person that they have a PM waiting.
  • "How much is shipping to ....": This is a very specific and directed question that is not of interest to anybody else.


Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


Reporting problematic posts

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.


Other suggestions
  • Use Google, books, or other definitive sources. There is a lot of information out there.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
See more
See less

Fixing original qume drives from the ibm portable

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Fixing original qume drives from the ibm portable

    Hi, have my ibm portable up and running again.
    The unit looks brand new even got the original ibm bag floppys manual etc.

    But none of the 2 qume 360k 5.25 drives work, i formatted some 360k dsdd floppy's on my 286 that have a nice hd drive working.
    The qume drives TYPE HF65A-B12Q (they say ibm in the plastic front black color) refuse to boot from any floppy i do, i have read that they have speed issues and they need to have the motor speed adjusted im not sure if this is correct.
    The belts look to be fine in booth units they are very clean and seem to have little use.

    Somebody have experience fixing this drives ?.

    Thanks!.

    #2
    Since the 286 has a high density drive it can't reliably format/write double density disks that can be read on 360K drives. In order to be sure you will need to use a disk that was made on a 360K drive.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

    Comment


      #3
      Give them a good cleaning - the heads might be contaminated and the rails can get sticky which causes head positioning problems.

      The drive model is a Qume Trak 142. See https://amaus.org/static/S100/qume/d...h%20floppy.pdf for the maintenance manual.

      Comment


        #4
        Originally posted by Stone View Post
        Since the 286 has a high density drive it can't reliably format/write double density disks that can be read on 360K drives. In order to be sure you will need to use a disk that was made on a 360K drive.
        i see going to hook the qume drive to my 286 and generate the disk imagenes using it to be sure.

        Comment


          #5
          Originally posted by mbbrutman View Post
          Give them a good cleaning - the heads might be contaminated and the rails can get sticky which causes head positioning problems.

          The drive model is a Qume Trak 142. See https://amaus.org/static/S100/qume/d...h%20floppy.pdf for the maintenance manual.
          Thanks for the link this don't seem to be an easy job

          Comment


            #6
            Originally posted by soviet9922 View Post
            ... , i have read that they have speed issues and they need to have the motor speed adjusted im not sure if this is correct.
            The belts look to be fine in booth units they are very clean and seem to have little use.

            Somebody have experience fixing this drives ?.

            Thanks!.
            Since the 5155 is a favorite of mine, I've worked on several of the Qume Trak 142's. They are not that hard to work on. I've found the biggest issue with these is the lube drying out on the rails and the spindle motor bearings. So, before you make ANY adjustments, make sure to clean and lubricate the rails. If you find the speed is off, don't adjust it until you verify that the motor and spindle bearings are lubed and running freely. On the first one I serviced, I made the mistake of attempting to adjust the motor speed with sticky bearings. I found that I could not attain a stable speed until I lubricated the motor bearings. Maybe if I had lubed it first a speed adjustment would not have been required!!

            Comment


              #7
              Originally posted by ibmapc View Post
              Since the 5155 is a favorite of mine, I've worked on several of the Qume Trak 142's. They are not that hard to work on. I've found the biggest issue with these is the lube drying out on the rails and the spindle motor bearings. So, before you make ANY adjustments, make sure to clean and lubricate the rails. If you find the speed is off, don't adjust it until you verify that the motor and spindle bearings are lubed and running freely. On the first one I serviced, I made the mistake of attempting to adjust the motor speed with sticky bearings. I found that I could not attain a stable speed until I lubricated the motor bearings. Maybe if I had lubed it first a speed adjustment would not have been required!!
              Do you recomend some kind of lube ? wd-40 could be ok ?

              Comment


                #8
                I don't recommend wd-40 as a lubricant. It evaporates to readily. It makes a good solvent though. I used a silicone spray lube. However, I did not spray it on the parts directly. I sprayed it into a small container i.e. the cap from the spray can and used a Q-tip to apply it to the rails. I then used a small syringe to apply it to the motor bearings. Note, you will need to remove the pc board from the drive to get good access to the rails. I don't remember for sure, but I think I had to remove the spindle drive motor to get access to it's bearings. DO NOT REMOVE the HEAD STEPPER MOTOR, or HEAD CARRIAGE ASSEMBLY or RAILS or anything else that could affect head alignment.

                Comment


                  #9
                  Originally posted by ibmapc View Post
                  I don't recommend wd-40 as a lubricant. It evaporates to readily. It makes a good solvent though. I used a silicone spray lube. However, I did not spray it on the parts directly. I sprayed it into a small container i.e. the cap from the spray can and used a Q-tip to apply it to the rails. I then used a small syringe to apply it to the motor bearings. Note, you will need to remove the pc board from the drive to get good access to the rails. I don't remember for sure, but I think I had to remove the spindle drive motor to get access to it's bearings. DO NOT REMOVE the HEAD STEPPER MOTOR, or HEAD CARRIAGE ASSEMBLY or RAILS or anything else that could affect head alignment.
                  Thanks for the tip going to try this.

                  Comment

                  Working...
                  X