I believe there are a few people using the Pico Systems brush PWM servo amp with mesa controller boards. One quirk of the brush servo amp is that after being enabled (coming out of E-stop) it needs a short pulse in each direction to reset the shutdown latch in the FET driver chips. In the ppmc driver for the Universal PWM controller, I have a state machine that does this on two consecutive servo cycles, it is enabled by setting the bootstrap parameter to true.
Anybody using our brush servo amps with other controller boards would need to provide the same function. Looking through the hostmot2 documents, I don't see any such function as being built in. Certainly, a little HAL component could be inserted between the PID outputs and the pwmgen inputs to generate these pulses and then pass through the normal signals. I have a customer looking at using the brush PWM servo amp with a 5i20, and wanted to get this detail figured out. Thanks for any info on what users are doing about this.... Jon ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
