Originally Posted by HayTay  Dave,
Good to hear from you! For those following diarmaids HobbyCNC Pro assembly thread, could you enlighten us with the features and benefits of the NEW PRO driver board over the original HobbyCNC 4AUPC driver board. What, if any, performance gains in speed or torque, stability, etc. would someone expect to see when comparing the original HobbyCNC 4AUPC board to the New HobbyCNC Pro board, given the same set of unipolar stepper motors?
Oh, and the new board is ROHS compliant, too, which, if I'm not mistaken is one of the (many) reasons that diarmaid purchased from HobbyCNC (seeing that he resides in Ireland).
Judging from the many posts on this, and other forums, the Sanken/Allegro SLA7062M driver chips are very susceptible to a catastrophic failure. In the driver chips defense, it is usually a mistake on the part of the operator that causes the failure. Are the new chips that you are using on the HobbyCNC Pro board just as prone to user error or are they more forgiving?
Thanks!!! |
Same performance can be expected as with the SLA7062M driver boards (4AUPC)
Added features of the PRO board are:
Idle current reduction after 10 seconds of no movement for each axis. Can be changed with a simple resistor value substitution.
99% less stepper hiss.
Now supports 1/1, 1/2, 1/4, 1/8, and 1/16 stepping.
Chips have built in protection from open or shorted steppers. This alone should aleviate 90% of the blown chips. Not impossible, just harder to do.
Same clear concise step by step instructions and our famous support via our Yahoo group for HobbyCNC customers. It stays on topic, spam is non existant and sports 1200+ members.
The chip is Sankens absolute latest technology in unipolar stepper drivers.
MOST all problems are due to not following the instructions (assembly error), poor solder joints, and just plain being in a hurry to get her up and running.