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  • Here's What's Happening Lately:

    • On 12/1/2020 at 1:40 PM, Z1500 said:

      I think I'm starting to figure out some critical information about how the autodrive works that would explain this.  The autodrive does not stop it's upward or downward travel at the exact same spot every time (Terrifying). It seems to stop at a certain level of strain, not at a fixed distance of stroke. Unfortunately strain in a progressive press changes based on dozens of variables that are constantly changing. If a shell is taking a little extra effort to re-size in station one, that can cause your bullet seating depth to be high and crimp to be light in station 4+5. And what about the times when station one is empty, those bullets go in deeper and get crimped extra aggressively. Not good.

      But you can adjust this amount of strain with the digital clutch. If you turn it high enough I think you can make it hit the mechanical limits of the up and down stroke, just like Dillon intended. BUT at that point you are at such a high torque level, if a bullet fell off or shell was out of place it would be crushed sooo hard it would likely damage the machine. Example- I'm loading 9mm and Digital Torque of 5 is enough to get the job done but my bullet and primer seating depths vary .020" and the machine is not hitting the mechanical stops. I have only tested this a tiny bit as it scares me to run it at high torque with how fast the machine moves. But the tiny bit of testing I did at 15 torque, it did hit the mechanical stops top and bottom every time.  

      I think the fix for this should be separate digital clutch settings for bullet seating, primer seating, and a general clutch setting that covers 95% of the stroke for safety.

      Oh and one extra slow speed would be great, like 100rph. Just for setting up.

       

       
       

      Hi @Z1500 When you calibrate the 650/750 autodrive with an empty shellplate the crank stops when it hits the upper stop block and then lowers until it hits the baseplate cut out. This tells the stepper motor how many steps up and down to perform each stroke until a new calibration occurs. The stroke should stay exactly the same until you calibrate again. The only way the travel changes is if you have an obstruction that does not allow the crank to fully calibrate. If you get a jam or have a sensor stop the press with an error message best practice is to remove the cases and recalibrate to ensure the issue is cleared and the machine can fully cycle to the stop points. 

      After you calibrate the machine with an empty shellplate the software backs off the stroke so that the crank isn't hitting these stops points any longer, you set your dies to the appropriate height after calibration using the jog up and down features which don't go all the way to the physical stopping points. 

      It is also important to make sure that your dies aren't hitting the shellplate as a false top stop. We recommend leaving a slight gap above the shellplate and dies after you calibrate and install them. You want be sure you are not creating a false top physical stop by a die being too low in the toolhead keeping the platform from going all the way to the top. If you accidentally calibrate with a case in the shellplate when the motor detects resistance when the case hits the die that will be the new stopping point for the crank unless you remove the case and recalibrate. You will notice that cases won't insert in the shellplate and primers won't seat etc. if you accidentally calibrate with a case or obstrution keeping the press from fully going to the top of the stroke.

      You should always keep the digital clutch and TorqueSense settings as low as possible to avoid damage to the press and components. You will notice that the digital clutch is active when the platform is rising up to meet the cases in the dies. The TorqueSense is active and will error when the platform is going back down and the index ring is turning the shellplate to advance the cases. If you raise the digital clutch to 20 this safety feature is no longer active and will likely not stop during a jam. 

      Thank you,

      Misty

      M7 Support 

      Digital Clutch Use on the Mark 7® 650 PRO Autodrive.pdf

    • I think I'm starting to figure out some critical information about how the autodrive works that would explain this.  The autodrive does not stop it's upward or downward travel at the exact same spot every time (Terrifying). It seems to stop at a certain level of strain, not at a fixed distance of stroke. Unfortunately strain in a progressive press changes based on dozens of variables that are constantly changing. If a shell is taking a little extra effort to re-size in station one, that can cause your bullet seating depth to be high and crimp to be light in station 4+5. And what about the times when station one is empty, those bullets go in deeper and get crimped extra aggressively. Not good.

      But you can adjust this amount of strain with the digital clutch. If you turn it high enough I think you can make it hit the mechanical limits of the up and down stroke, just like Dillon intended. BUT at that point you are at such a high torque level, if a bullet fell off or shell was out of place it would be crushed sooo hard it would likely damage the machine. Example- I'm loading 9mm and Digital Torque of 5 is enough to get the job done but my bullet and primer seating depths vary .020" and the machine is not hitting the mechanical stops. I have only tested this a tiny bit as it scares me to run it at high torque with how fast the machine moves. But the tiny bit of testing I did at 15 torque, it did hit the mechanical stops top and bottom every time.  

      I think the fix for this should be separate digital clutch settings for bullet seating, primer seating, and a general clutch setting that covers 95% of the stroke for safety.

      Oh and one extra slow speed would be great, like 100rph. Just for setting up.

       

       
       

      Edited by Z1500
    • I am having exactly the same problem with CCI Small Pistol primers with a new 750 and V 1.13 firmware.  Attempting to upgrade has not completely disabled the drive, but the original issue was exactly as originally described above.  Calibration with clear shell plate and everything looking good.  When jogging down or moving down (setup) screen, the primer stage appears to be where it should be, but in operation, the primer is left way high.  The shell plate is tight and rest of the operation of the press looks right.  I am a dealer, this is the first 750 install I have done but I have done many 650 installs and never had this issue.

       

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