探索型PMC-eight步进电机光滑盒

Explore Scientific PMC-eight Stepper Smoother Box

2024-01-18 05:49:30

使用说明

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Summary

Astrophotography using an equatorial mount telescope requires precise motion control in order to produce sharp images. This is particularly true for the RA axis motion. Explore Scientific (and other manufacturers) mounts use stepper motors to control the RA and DEC axis motion. The step motion is improved when the stepper controller board has a minimal voltage drop to the stepper at all times. This is accomplished by adding opposing diodes on each of the steppers 4 wires in order to create a voltage drop. The smoother PC board (purchased online) has the diodes mounted in this manner and therefore requires no soldering. The smoother boards are sold with 4 wire cables that are used in this design to connect to a male and female serial DB9 connector (purchased online). The three - 3D printed parts house the smoother card and DB9 connectors and provide a clean way to attach this circuit to the RA axis of the mount. The serial RA wire from the PMC-eight box plugs into the female port on this assembly. The male port plugs into the equatorial mount.

The photographic improvement for planetary astrophotography is still being debated in astronomy forums. I encourage you to try this add-on circuit and report back on the results.

Print Settings

Printer brand:
LulzBot
Printer:
Mini
Rafts:
No
Supports:
Yes
Infill:
20%
Filament brand:
Matterhackers
Filament color:
Any
Filament material:
PETG
Notes:
Additional parts needed:

Male and Female 9 pin Serial Connectors with screw wire attach:
https://www.amazon.com/gp/product/B093PFX62L/ref=ppx_yo_dt_b_asin_title_o04_s01?ie=UTF8&psc=1

Smoother PC board:
https://www.amazon.com/dp/B071WG3SZQ?psc=1&ref=ppx_yo2ov_dt_b_product_details

Qty 6 Metric M3x16mm hex head machine screws with nuts (#4-40 x 5/8" screws could also be used)

Note: The source listed above provides three smoother boards and three connector cables in the package. Only one smoother board and two cables are needed. One end on each of the cables should be cut off in order for the wires to be long enough to connect to the serial DB9 screw terminals. The terminal pins 6,7,8 and 9 are connected through the smoother card to those same pins on the other connector.