This week was spent installing the X27 stepper motor into the Smiths speedometer. The magnetic mechanical drive was removed and there was almost enough space. With a little grinding on the housing space was made. Had to drill 2 holes to mount the stepper. the holes were 2mm dia and accuracy was a must. But like all my other hole drilling experiences, the holes were just a bit off. With a little slotting things are pretty close. Close enough for some testing anyway. Cut the Speedometer spindle short and 3D printed a coupler to mate the speedo spindle to the stepper motor.
Turns out the TR7 speedo has slightly larger bolts holding the gauge face on then the GT6. But opening them up the tiniest amount the GT6 face bolted right on. Luckily the GT6 needle seems to fit on no problem. With some calibration of the stepper motor to the gauge I am now able to enter a MPH into the program and the needle points to it on the gauge. See video if interested https://youtu.be/iNGHQlcFkZA May not seem like a big deal but it feels like an accomplishment to me :-) Oh the odometer isn't installed in the video but it's all basically done. Just need to tidy up a few things and reassemble it.
The odometer stepper motor is taking some space of the high beam light tube. I could probably make it all squish in but felt like putting in some LED's for the warning lights would be a better all round solution. Ordered some 1.8mm LED's that should fit nicely on the end of the smaller warning light and inside the larger one. My only concern was if they would be bright enough. After they arrived did some testing and the light it is plenty bright, maybe too bright for the high beam. The LED is much smaller than the large bulb and tube it replaces. Makes the large assembly look comical in comparison.
This has been a fun project. Just a few more tweaks and this will be done. Also need to convert the Tach and perhaps the temp gauge(s) but they should be much simpler now.
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